1. Department of Psychiatry and Psychotherapy; Innsbruck Medical University; Innsbruck Austria
2. Parnassia Psychiatric Institute; The Hague the Netherlands
3. Department of Psychiatry; Groningen University; Groningen the Netherlands
4. Department of Epidemiology; Columbia University, New York; New York
5. Biological Laboratory of Psychiatry; McLean Hospital; Harvard Medical School; Boston Massachusetts