[1] Ctr Catholic Univ, Univ Psychiat, Leuven Campus Kortenberg,Leuvensesteenweg 517, B-3070 Kortenberg, Belgium
[2] Vrije Univ Amsterdam, Med Ctr, Dept Epidemiol & Biostat, NL-1081 BT Amsterdam, Netherlands
[3] Vrije Univ Amsterdam, Med Ctr, EMGO, Inst Hlth & Care Res, NL-1081 BT Amsterdam, Netherlands
[4] Univ London Imperial Coll Sci Technol & Med, Natl Heart & Lung Inst Cardiovasc Sci, London W6 8RP, England
[5] Hannover Med Sch, Dept Psychiat Social Psychiat & Psychotherapy, D-30625 Hannover, Germany
[6] Univ Southampton, Sch Med, Southampton SO16 6YD, Hants, England
[7] Univ Munich, Dept Psychiat, D-80336 Munich, Germany