[1] Massachusetts Gen Hosp, Dept Psychiat, Chester M Pierce MD Div Global Psychiat, Boston, MA 02114 USA
[2] Harvard Univ, Sch Med, Boston, MA USA
[3] Univ Addis Ababa, Dept Psychiat, Coll Hlth Sci, Sch Med, Addis Ababa, Ethiopia
[4] Univ Addis Ababa, Dept Pharmacol & Biochem, Coll Hlth Sci, Sch Med, Addis Ababa, Ethiopia
[5] Kings Coll London, Ctr Global Mental Hlth, Inst Psychiat Psychol & Neurosci, London WC2R 2LS, England
[6] Kings Coll London, Ctr Affect Disorders, Inst Psychiat Psychol & Neurosci, London WC2R 2LS, England
[7] Harvard Univ, Sch Publ Hlth, Boston, MA 02115 USA