About Us


CET's mission is to serve patients, consumers, health care providers and workplace managers to:


  • Educating the public, students and professionals about effective use of environmental therapies.
  • Offering authoritative information on non-medication treatments for seasonal affective disorder, nonseasonal depression and circadian rhythm sleep disorders.
  • Fostering research on environmental interventions that promote alertness, energy, and performance — while    combating fatigue, stress, depression and sleep disturbances that affect millions of people.



The Organization



The Center for Environmental Therapeutics is a 501(c)(3) nonprofit organization founded in 1994 in response to accelerating international interest in new environmental therapies. The Center is made up of a multidisciplinary team of eminent researchers and clinicians — experts in mental health, ophthalmology and optical physics, electrical engineering, biochemistry, physiology and gerontology — who are committed to pooling their efforts toward the development and application of effective environmental therapies.






The People



Image description

Dr. Michael Terman

President of CET, was graduated from Columbia University and received his doctoral degree in physiological psychology from Brown University in 1968. He is Professor of Clinical Psychology in Psychiatry at Columbia, Research Scientist VI at the New York State Psychiatric Institute (NYSPI), and Director of the Center for Light Treatment and Biological Rhythms at New York-Presbyterian Hospital.

For the first part of his career, Michael concentrated on laboratory studies of biological rhythms and sensory perception in animals, especially their reactions to daily cycles of light and darkness. In the early 1980's, when such effects were first demonstrated in humans, he turned in a clinical direction, with studies of the antidepressant effects of light therapy, sponsored by the National Institute of Mental Health. He joined the faculty of Columbia’s College of Physicians and Surgeons and NYSPI, where he established the Clinical Chronobiology and Winter Depression Programs, in which several hundred patients have participated in treatment trials and studies of physiological responses.

This work led to a set of new non-drug therapies including 10,000 lux light, dawn/dusk simulation and high-density negative air ionization. In 1988, he was a co-founder with Anna Wirz-Justice of the Society for Light Treatment and Biological Rhythms (SLTBR), which he served as President (1991-93). With Douglas Holmes, Gustave Manasse and Cynthia Neely, he founded CET in 1994.

Michael chaired the Task Force on Light Treatment for Sleep Disorders (American Academy of Sleep Medicine and SLTBR), and currently serves on the editorial board of the Journal of Biological Rhythms. In a 35+ year collaboration with his wife, Dr. Jiuan Su, the Terman lab has produced more than 200 scientific publications.


Image description

Dr. Anna Wirz-Justice

Anna Wirz-Justice is emeritus Professor and Research Fellow at the Centre for Chronobiology, Psychiatric Hospital of the University of Basel.

She received a Ph.D. in Organic Chemistry from University College London. Anna initially worked on circadian rhythms in animals and the effects of psychiatric medications on neurotransmitter receptor and rest-activity rhythms. The Basel clinic was one of the first to extensively study the antidepressant effects of sleep deprivation in the early ‘70s, immediately after Burkhard Pflug’s pioneering discovery. During a fellowship at the U.S. National Institute of Mental Health, she and Thomas Wehr, M.D. carried out the first sleep phase advance experiment in a bipolar patient. Anna introduced light therapy to Europe, followed up with more than 20 years of research on seasonal affective disorder and light therapy. In the constant routine sleep laboratory – where the subject stays awake in bed for more than a day – together with Kurt Kräuchi and Christian Cajochen, the focus has been on thermophysiology (warm feet to fall asleep) and the sleep and waking EEG in young and older subjects. Actimetry – automated recording of body movement – in psychiatric patients yields fascinating insights into circadian dysregulation in a wide variety of disorders that might be amenable to improvement with light therapy.

Anna is a former president of the Society for Light Treatment and Biological Rhythms. A prestigious Anna-Monika-Prize with Thomas Wehr recognised their seminal work in the chronobiology of depressive illness. In 2002, she received the Scholar's Prize of the City of Basel, awarded for outstanding scientific career achievement.

In a thematically relevant avocation, she has interacted with architects to enhance the circadian impact of indoor lighting. In 2002 she was a consultant to Philippe Rahm and Jean-Gilles Décosterd in creating their light room in the Swiss Pavillion at the Venice Bienniale, Physiological Architecture.

Anna is director of CET's Chronotherapeutics Consultants, formed in 2004 to advise hospital psychiatrists on the implementation of light and wake therapies as adjuncts to drug treatment of major depression. Most recently, she lead a team including Francesco Benedetti and Michael Terman to the field’s first treatment manual for clinicians, Chronotherapeutics for Affective Disorders.


Image description

Dr. Francesco Benedetti

Francesco Benedetti MD (University of Modena, 1991) is Head of the Psychiatry and Clinical Neurosciences research group at the San Raffaele Hospital in Milano, and contract professor of Psychiatry and of General Psychopathology at the University Vita-Salute San Raffaele. 

His clinical research group gathers researchers working at the interface between neuroscience and behavioral disorders. Areas of expertise encompass clinical psychobiology, brain imaging, genetics of response to psychiatric treatments, pharmacology, neuropsychology, neurophysiology, and and genetic correlates of psychopathological conditions.

In the last 15 years he and his group have developed clinical chronotherapeutics of mood disorders into a practicable everyday method for the psychiatric ward, particularly focussing on bipolar disorder. Beginning with sleep deprivation, they added sleep phase advance, light therapy, different medications to see if the rapid response could be maintained. They found that the same gene polymorphisms that hinder clinical response to antidepressants affect the response to chronotherapeutics in a similar fashion.  At the functional MRI level, those selective regions of the brain that are modified by improvement on antidepressants also are the ones involved in chronotherapeutic response.  These multiple approaches provide an important scientific database to document efficacy and mechanisms of action of non-pharmacological antidepressant methods.           

Francesco is a member of CET's Chronotherapeutics Consultants, and was the major clinical expert in writing our treatment manual, Chronotherapeutics for Affective Disorders.


Image description

Dr. Gustave Manasse

Dr. Gustave Manasse received the Ph.D. in Clinical Psychology from Columbia University. His dissertation, "Self-Regard as a Function of Environmental Demands in Chronic Schizophrenics," presaged a career-long focus on non-pharmacological factors that facilitate social adaptation and behavioral success in the face of background disturbances.

Gus served on the staff of Hillside Hospital, Queens, before moving to the City University of New York, where he served for 20 years as a Director of Counseling and Psychological Services. He is now Professor Emeritus of Psychology.

In the 1980's, Gus coached Michael Terman's transition from the laboratory to the clinic. In addition to his organizing role in CET, Dr. Manasse was a founder and serves on the Board of Directors of New Horizons, a community and residential training facility for the developmentally disabled, operating in Orange and Dutchess Counties with headquarters in Poughkeepsie, NY.


Image description

Dr. Dan Oren

Dr. Dan Oren received the M.D. degree, with specialty in Psychiatry, from Yale Medical School, where he serves as an Associate Professor of Psychiatry (Adjunct). He is Medical Director at Birmingham Group Health Services in Ansonia, Connecticut.

Following a fellowship in the Clinical Psychobiology Branch of the U.S. National Institute of Mental Health, he worked as a grants specialist in their extramural research program and as an analyst at the Food and Drug Administration. He has served as chair of the FDA's Psychopharmacology Advisory Panel.

Dan's research and clinical interests include seasonal, atypical, chronic and resistant depression, clinical psychopharmacology, light therapy, sleep disorders and circadian rhythm disturbances. He has written numerous scientific articles and book chapters, and is lead author of "How to Beat Jet Lag: A Practical Guide for Air Travelers."

He is a former president of the Society for Light Treatment and Biological Rhythms. Dan serves as Medical Director of CET's Chronotherapeutics Consultants, formed in 2004 to advise the hospital and managed care industries on the implementation of light and wake therapies as adjuncts to drug treatment of major depression.


Image description

Elaine Tricamo, R.N.

Elaine Tricamo was graduated from Queens College with majors in Psychology and English Literature. Her part-time employment throughout college, working with emotionally disturbed children, led to a full-time profession as a Special Education teacher at a school for schizophrenic adolescents and a career-long interest in the role biology plays in mental illness.

She joined the New York State Psychiatric Institute (NYSPI) at Columbia University Medical Center in 1976 (the very same year that marked the Institute's shift from a psychoanalytic orientation to an emphasis on biological psychiatry) where she served for 15 years as administrator of the Depression Evaluation Service.

Throughout her years of monitoring clinical trials and data collection for many outstanding psychiatric researchers in a variety of investigative areas, she eventually became part of the process of designing studies and writing grant proposals. She met Michael Terman in the early 1980's when she oversaw the data collection for his first clinical trial of the antidepressant effect of light therapy. Following her service at NYSPI, she became a clinical associate in private practice, combining her experience in short-term psychotherapies with her expertise in psychopharmacology.

She is a member of the American Society of Clinical Psychopharmacology.


Image description

Dr. Klaus Martiny

Klaus Martiny, MD, PhD, Specialist in Psychiatry, works as a researcher at the Psychiatric Research Unit, Mental Health Centre North Zealand, University Hospitals of Copenhagen.

His main research interest focuses on chronotherapeutic treatments as monotherapy or as add-ons to psychopharmacologic treatment for depression. His studies have included a multilevel approach to outcome measures across biological, pharmacokinetic, psychometric and psychosocial levels. He has conducted a series of chronotherapeutic studies using light and sleep deprivation, funded by government grants.

He is a board member of the Society of Light Treatment and Biological Rhythms (SLTBR) and the Danish Sleep Medicine Society.


Image description

Dr. Thomas White

Thomas White, MD, MS, MA, is an informatics researcher and healthcare executive. He is Director of the Bureau of Mental Health Informatics for New York State Office of Mental Health, and an Associate Professor of Mental Health Informatics at Columbia University.

His main research focus is developing the infrastructures and methods needed to accelerate the pace of translational research for mental health. This has involved identifying and overcoming barriers to faster instrument and protocol development, data collection and sharing, analysis, and display of data in ways that are conveniently implemented by researchers, clinicians, and executives. He has developed software suites used internationally for neuroelectrophysiology, functional brain imaging, disease management, and structured interviewing.

He has also consulted for the US Dept. of Health & Human Services to tackle national challenges with data standards. His Dialogix interviewing system hosts the CET instruments, and he has led the analysis of those data for geographical and environmental correlates of SAD.


Image description

Dr. Konstantin V. Danilenko

Konstantin V. Danilenko, MD, is a biomedical researcher at the Institute of Internal Medicine, Siberian Branch of the Russian Academy of Medical Sciences, Novosibirsk, Russia.

His main research interest focuses on the light physiology in humans. He has conducted a series of fundamental and clinical studies on retinal sensitivity, biological clock and melatonin secretion, winter depression and reproductive function, with support from colleagues from abroad and international grants.

He has been a member of the Society for Light Treatment and Biological Rhythms (SLTBR) since 1989, and serves on its Board of Directors.


Image description

Dr. Joseph Wu

Joseph Wu earned his MD from the University of California Irvine and completed his residency in psychiatry with honors also at the University of California, Irvine.

He is the author of over 50 peer reviewed articles on neuropsychiatry on topics such as depression, sleep deprivation, schizophrenia, traumatic brain injury, Alzheimer’s disease, and brain imaging. He has been the recipient of National Institutes of Health and the National Alliance for Research in Schizophrenia and Depression funding on the topic of sleep deprivation and depression.

He has studied sleep deprivation effects on brain metabolic activity using positron emission tomography (PET) scans in both healthy subjects and depressed patients. He is especially interested in the therapeutic use of sleep deprivation (also known as wake therapy) in conjunction with other chronotheraputic measures such as light therapy, to accelerate the treatment of depression. Another focus is on how sleep deprivation affects neuropsychological functions such as attention.


Image description

Dr. Claude Gronfier

Claude Gronfier received his PhD in neuroscience from the University Louis Pasteur (Strasbourg, France) in 1998. During a fellowship at Harvard Medical School, he studied the consequences of having an internal biological clock improperly reset by light, and how to maintain synchrony with the light-dark cycle in extreme conditions such as spaceflight.

In 2003, he joined an Inserm laboratory (French National Institute of Health and Biomedical Research) as Chargé de Recherche (Senior Research Associate). His current projects focus on light’s mechanisms of action on the biological clock, and sleep disorders in conditions such as ocular pathology, neurodegenerative disease, aging and mood disorders.

He is a board member of the French Society of Research and Sleep Medicine and the Society for Light Treatment and Biological Rhythms, and he serves on two technical committees of the Commission Internationale de l’Eclairage (CIE TC 6-62 and TC 6-63).

Claude is co-author of the recent book for the French public, En finir avec le blues de l'hiver et les troubles du rythme veille-sommeil (Marabout, 2008).


Image description

Dr. Janet B.W. Williams

Janet B.W. Williams, MS, DSW, is Vice President of Clinical Development at MedAvante, Inc., a company committed to enhancing signal detection in clinical trials by using centralized clinical evaluators. She is also Professor Emerita of Clinical Psychiatric Social Work in the Departments of Psychiatry and Neurology at Columbia University College of Physicians and Surgeons.

She is retired as a Research Scientist and Deputy Chief of the Biometrics Research Department at the New York State Psychiatric Institute, where she first started working with Drs. Terman and White. Dr. Williams is well known for her work in developing psychiatric classifications and instruments to measure psychopathology.

She is an author of more than 240 scholarly publications, serves on the editorial boards of several psychiatric and social work journals, and has been listed since 2002 as an ISI Highly-Cited Researcher in Psychology/Psychiatry.

She is an Honorary Fellow of the American Psychiatric Association, a fellow of the American Psychopathological Association, and a member of the American College of Neuropsychopharmacology, the nation's premier professional society in brain, behavior, and psychopharmacology research.


Image description

Dr. Farhad Hafezi

Farhad Hafezi completed his medical studies and medical doctorate in Bern in 1992. From 1993 to 1994, he attended a two-year course in experimental medicine and biology at the ETH Zurich (nowadays MSc Biology), followed by three years as a scientific post-doc in the Laboratory for Retinal Cell Biology in Zurich, Switzerland where his research focused on molecular mechanisms of retinal degeneration.

In his residency (1997-2000), he clinically focused on the anterior segment and corneal and refractive laser surgery. This choice of subspecialty led him to convert his research to the anterior segment. He is an associate Professor of Ophthalmology at the University of Zurich and completed his PhD thesis at the Erasmus University of Rotterdam in 2008.

Dr. Hafezi has published 35 peer-reviewed articles and 32 book chapters, reviews and case reports. He has received nine national and international awards and is an Editorial Board Member of the Journal of Refractive Surgery and the Iranian Journal of Ophthalmology.


Image description

Dr. Charlotte Remé

Charlotte Remé founded the laboratory of retinal cell biology within the setting of the University Eye Clinic Zurich (head: Prof. Rudolf Witmer) in the late 1970’s. At that time, it was very unusual and foresighted to establish a basic science laboratory within a clinic in Europe.

After medical school and residencies in pathology and ophthalmology in Germany, Dr. Remé joined the Eye Clinic Zurich. She then pursued a postdoctoral training with Richard W. Young at UCLA working on the renewal mechanisms of retinal photoreceptors. This research led to the discovery of autophagy, a cellular mode of removing or recycling cytoplasmic constituents.

After her return to Zurich, she began pioneering work on retinal circadian rhythms together with her colleagues Anna Wirz-Justice and Michael Terman. Later, her studies were focused on the deleterious effects of bright light in the retina. This work led to the discovery that light can induce the gene-regulated cell death by apoptosis. She and her team of postdoctoral fellows elucidated molecular mechanisms of retinal apoptosis and discovered the first gene directly involved in retinal apoptosis.

Over thirty years later, the laboratory is nationally and internationally recognized as one of the top institutions working on mechanisms of retinal degeneration and neuroprotection. And, the laboratory has grown and expanded to include work on neuroprotection, visual pigment interactions and the generation of mouse models for retinal degenerations.

As recognition for her outstanding achievement and scientific contribution, Dr. Remé received a number of international prizes throughout her career. Specifically, ARVO awarded Dr. Remé the Proctor Medal, which is the highest award in basic ophthalmological science.


Image description

Dr. John Gottlieb

Dr. John Gottlieb received his undergraduate degree from Oberlin College, attended medical school at the University of Illinois at Chicago, and completed a residency in psychiatry at Yale University in New Haven, CT.

He is an Assistant Professor of Psychiatry at the Feinberg School of Medicine of Northwestern University in Chicago, IL. In his university position, John has been actively involved in residency education and supervision.

In addition, he is the Medical Director of Chicago Psychiatry Associates, a group practice specializing in the evaluation and treatment of cyclic mood disorders. He is a member of the Training and Curriculum Committee of the International Society for Bipolar Disorders.

John’s clinical focus on bipolar disorders led to his interest in both the circadian underpinnings of affective disturbances and the use of biological rhythm-modifying interventions to treat these conditions. He is skilled in the use of Interpersonal Social Rhythm Therapy, light and wake therapy, and other chronotherapeutic strategies. John's current research focus is on circadian phase variation in bipolar illness.


Image description

Oliver Stefani, M.Eng

Oliver Stefani works at the Fraunhofer Institute for Industrial Engineering (IAO). His research activities are focused on the interaction between light and humans, including cognitive, biological and emotional factors and how this can be deployed at office workplaces.

Oliver studied micro-engineering with the focus on optics and light. Until 1998 he worked in an optics-laboratory on polymer optical fibres. After his Masters Degree in Design he developed a 3D-projectionsystem at the University of Stuttgart for which he received the first price for technology management. He was head of the visualisation lab at the Center of Applied Technologies in Neuroscience in Basel. Together with Christian Cajochen he evaluated human reactions on displays with a LED backlight. The LED backlight having increased light emission at 464 nm caused significantly less tiredness compared to a standard display.

He is currently developing a Circadian Effective Display. He also developed “Helisosity” a dynamic multispectral light source, the “nLightenend Workplace” which integrates illumination and information displays and “Virtual Sky”, a light ceiling based on 35000 LEDs capable of simulating a blue sky with passing clouds.

Oliver teaches „Light and Colour“ at the University in Luzern and at the Stuttgart State Academy of Art and Design.


Image description

Nikki L.K. Hafezi

Nikki L.K. Hafezi provides fundraising and business development services to non-profit organizations and academic institutions in the biomedical field throughout Europe and the United States.

She is currently the managing director of GroupAdvance Consulting GmbH in Zurich, Switzerland. In the United States, Mrs. Hafezi served as the industrial liaison officer for a multi-institutional biomedical research collaboration in Los Angeles, California funded by the National Science Foundation.

Earlier, Mrs. Hafezi served as a development executive for a private hospital and a national public health agency. Mrs. Hafezi graduated with an English and Spanish degree from UCLA and just completed her master’s degree in intellectual property at the Swiss Federal Institute of Technology (ETH ZH).

She resides with her husband and daughter in Zurich, Switzerland. Nikki Hafezi is an independent consultant and serves as the Director of Development of CET. Her role includes guiding CET in the transition from a charity to a non-profit organization and helping CET achieve its goals of enhancing research and education in the field of environmental therapeutics.


Image description

Markus Haberstroh

Markus Haberstroh studied architecture at the University of Applied Sciences in Aargau, Switzerland, graduating in 2001. From 2001 to 2004 he worked with Herzog & de Meuron Basel as Project Manager on various projects and competitions in Europe. In 2005 he accomplished his civilian-service at the Center for Chronobiology in Basel where he became acquainted with the connection between architecture and chronobiology. During his civilian service he designed and constructed the website of the Center for Chronobiology Basel as well as CET’s website.

When he returned to his field in 2006 he continued administering CET’s website and constantly expanded CET’s Web presence until today. In 2009 Markus started his own architectural practice in Basel. One of his main goals is to investigate new applications for optimal daylight use in buildings, in order to improve comfort and reduce energy consumption.


Image description

Dr. Michael J. B. Krieger

Dr. Krieger got his master’s in biology from the University of Basel (Switzerland), based on research he performed at the University of Oxford, England. Before he enrolled as a Ph.D. student at the University of Lausanne (Switzerland) he worked as a free-lance programmer for Novartis. His Ph.D. thesis included research in the field of molecular biology, population genetics, animal behavior, and robotics.

After finishing his Ph.D. with honors (summa cum laude), he completed a three-year post-doc at the University of Georgia, followed by a year as Research Associate. In 2003, he obtained the prestigious and competitive “Rockefeller Fellow” position at the Rockefeller University in New York where he developed software that supports the design, simulation, and analysis of complex systems.

In 2007, Dr. Krieger returned to Switzerland where he enrolled in the intellectual property master’s program at the Swiss Federal Institute of Technology (ETH). After successfully completing his master’s degree in 2008, he joined GroupAdvance Consulting GmbH as Chief Scientific Officer (CSO).

Dr. Krieger is an accomplished scientist. He has published over 25 peer-reviewed scientific publications, of which 14 as first or corresponding author. Two of his first author publications made the cover page of the prestigious scientific journals Science and Nature. He also has been an invited speaker to several international congresses, among others, to the International Congress of Genetics and the Gordon Research Conference.

Through his 10-year experience as an active researcher he acquired not only a broad understanding of modern science but also gained detailed knowledge of the inner workings of research institutions and funding bodies. He is supporting CET to achieve its goals of enhancing research and education in the field of environmental therapeutics.


CONTACT: Center for Environmental Therapeutics, 337 West 20th Street, Suite 4M, New York NY 10011, USA