[1] Parnassia Psychiat Inst, The Hague, Netherlands
[2] Univ Groningen, Univ Med Ctr Groningen, Dept Psychiat, Groningen, Netherlands
[3] Univ KwaZulu Natal, Nelson R Mandela Sch Med, Dept Psychiat, Durban, South Africa
[4] Columbia Univ, Mailman Sch Publ Hlth, Dept Epidemiol, New York, NY USA
[5] Parnassia Psychiat Inst, Kiwistraat 43, NL-2552 DH The Hague, Netherlands