Reducing the global burden of depression. Population-level analysis of intervention cost-effectiveness in 14 world regions. BJP, 184, 393–403. The last sentence of the third paragraph under ‘Effectiveness of interventions’ (p. , col. 3) should read: ‘Temporal symptom severity profiles for unremitted episodes were informed by a commissioned analysis of the “Pittsburgh 600” data-set assembled from six research projects conducted between 1982 and 1992 at the Mental Health Intervention Research Centers for Mood and Anxiety Disorders and for Late Life Mood Disorders, Western Psychiatric Institute and Clinic, Pittsburgh, Pennsylvania, USA (Thase et al, 1997; M. A. Dew, personal communication, 2001).’

Humanity and biology in psychiatry (letter). BJP, 184, 363. The last sentence of the penultimate paragraph (col. 3) should read: Although much empirical research is burdened with vested interests, criticised for not being conscious enough of its assumptions, and maladapted to studying the profound experiential suffering we see in mental illness, it remains the only way to replace opinion with anything more certain.