[1] UCL, Div Psychol & Language Sci, London, England
[2] Univ East Anglia, Dept Clin Psychol & Psychol Therapies, Norwich, England
[3] Kings Coll London, Inst Psychiat Psychol & Neurosci, London, England
[4] Univ Exeter, Med Sch, Exeter, England
[5] Norfolk & Suffolk NHS Trust, Norwich, England
[6] Univ Newcastle, Populat Hlth Sci Inst, Newcastle, England
[7] Bradford Teaching Hosp NHS Trust, NIHR ARC Yorkshire & Humber, Improvement Acad, Bradford, England
[8] Anna Freud Natl Ctr Children & Families, London, England
[9] Univ Bristol, NIHR Sch Primary Care, Bristol, England
[10] Univ Bath, Dept Hlth, Bath, England