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