[1] Univ Manchester, Sch Social Sci, Dept Sociol, Manchester, England
[2] Kings Coll London, Dept Global Hlth & Social Med, London, England
[3] Univ Manchester, Div Psychol & Mental Hlth, Manchester, England
[4] Univ Lancaster, Spectrum Ctr Mental Hlth Res, Lancaster, England
[5] Univ Glasgow, MRC CSO Social & Publ Hlth Sci Unit, Glasgow, Scotland