1. From the Department of Psychiatry and Psychotherapy, Technische Universität München, Munich, Germany; the Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, U.K.; the Department of Hygiene and Epidemiology, University of Ioannina School of Medicine, Ioannina, Greece; the Institute of Social and Preventive Medicine. University of Bern, Bern, Switzerland; and the Psychiatric Institute, University of Illinois at Chicago, and the Maryland Psychiatric Research Center, Baltimore.