1. Psychiatric Epidemiology and Psychopathology Research Center; Lausanne University Hospital; Department of Psychiatry; Switzerland
2. Genetic Epidemiology Research Branch; Intramural Research Program; National Institute of Mental Health; Bethesda MD USA
3. Department of Psychosomatic Medicine; Clinic Barmelweid; Barmelweid Switzerland
4. Department of Neurology; Inselspital; Bern University Hospital; and University of Bern; Switzerland
5. Department of Internal Medicine; Lausanne University Hospital; Switzerland