[1] Inst Psychiat, Psychol Med, London, England
[2] Ctr Affect Disorders, Psychol Med, London, England
[3] Univ Catolica Norte, Dept Psiquiatria, Antofagasta, Chile
[4] Univ Chile, Dept Psiquiatria, Santiago, Chile
[5] TMMHC, Hong Kong, Hong Kong, Peoples R China