[1] Univ Coll London UK, Inst Epidemiol & Hlth, London, England
[2] Univ Leeds, Sch Dent, Leeds, England
[3] Greater Manchester Mental Hlth NHS Trust, Psychosis Res Unit, Manchester, England
[4] Univ Manchester, Manchester, England
[5] Keele Univ, Sch Med, Keele, England
[6] Bangor Univ, Sch Hlth Sci, Bangor, Wales
[7] Queen Mary Univ London, Inst Dent, London, England
[8] Manchester Metropolitan Univ, Sch Nursing & Publ Hlth, Manchester, England
[9] Manchester Metropolitan Univ, Pennine Care NHS, Manchester, England
[10] Leeds Teaching Hosp Trust, Leeds, England
[11] Univ Liverpool, Liverpool, England
[12] Royal Liverpool Univ NHS Fdn Trust, Univ Liverpool, Inst Populat Hlth, Dept Publ Hlth, Liverpool, England
[13] Univ Manchester, Ctr Hlth Informat, NIHR Appl Res Collaborat Greater Manchester NIHR A, Manchester, England
[14] Univ Lancaster, Spectrum Ctr Mental Hlth Res, Lancaster, England
[15] Lancashire & South Cumbria NHS Fdn Trust, Chorley, England