1. Centre for Chronobiology, Psychiatric University Clinic, Wilhelm Klein Strasse 27, CH-4025 Basel, Switzerland.
2. Department of Psychiatry, Columbia University, 1051 Riverside Drive, New York, NY 10032, USA.
3. Department of Psychiatry, Yale University School of Medicine, West Haven, CT 06516, USA.
4. Department of Psychiatry and Behavioral Sciences, George Washington University Medical Center, 2150 Pennsylvania Avenue N.W., Washington, DC 20037, USA.
5. Department of Psychiatry, University of California-San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.
6. Neuropsychiatric Institute, Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine at UCLA, Box 951759, C7-463 NPI, Los Angeles, CA 90025-1759, USA.
7. Western Psychiatric Institute and Clinic, University of Pittsburgh Medical Center, 3811 O'Hara Street, Pittsburgh, PA 15213, USA.
8. Department of Psychiatry and Human Behavior, Brain Imaging Center, University of California, Room 109, Irvine Hall, Irvine, CA 92697-3960, USA.
9. Department of Psychiatry, University of British Columbia, 2255 Wesbrook Mall, Vancouver, BC V6T 2A1, Canada.
10. Department of Psychiatry and Psychotherapy, Klinikum of the Albert-Ludwigs-University, Hauptstrasse 5, 79104 Freiburg, Germany.
11. Institute of Internal Medicine, Siberian Branch of the Russian Academy of Medical Sciences, Vladimirovsky spusk 2a, 630003 Novosibirsk, Russia.
12. Department of General Psychiatry, University Hospital for Psychiatry, Wahringer Gurtel 18-20, 1090 Vienna, Austria.
13. Department of Neuropsychiatric Sciences, Università Vita-Salute San Raffaele, School of Medicine, Via Stamira d'Ancona 20, 20127 Milan, Italy.
14. Center of Neurology and Psychiatry, National Institute of Mental Health, Kodaira, Tokyo 187-8551, Japan.
15. Department of Mental Health, University of Southampton, Royal South Hants Hospital, Southampton SO14 0YG, UK.
16. Department of Biological Psychiatry, Academic Hospital Groningen, Oostersingel 59, NL-9713 EZ Groningen, The Netherlands.