[1] St Georges Univ London, Populat Hlth Res Inst, London, England
[2] Middlesex Univ London, London, England
[3] Hlth Fdn, London, England
[4] Goodmayes Hosp, North East London NHS Fdn Trust, Ilford, England
[5] St Georges Univ Hosp NHS Fdn Trust, London, England
[6] Univ Coll London Bloomsbury, Div Psychiat, NIHR Mental Hlth Policy Res Unit, London, England
[7] NHS England & NHS Improvement, London, England
[8] London Sch Econ & Polit Sci, Care Policy & Evaluat Ctr, Dept Hlth Policy, London, England
[9] City Univ London, Sch Hlth & Psychol Sci, London, England
[10] St Georges Univ London, Populat Hlth Res Inst, Cranmer Terrace, London SW17 0RE, England