[1] Univ Bristol, Bristol Med Sch, primary care & GP, Bristol, England
[2] Univ Oxford, Nuffield Dept Primary Care Hlth Sci, Oxford, England
[3] Queen Mary Univ London, Wolfson Inst Populat Hlth, primary care & GP, London, England
[4] Identificat & Referral Improve Safety intervent, Bristol, England
[5] Univ Oxford, Pandem Sci Inst, probabil & Stat, Oxford, England
[6] Univ Oxford, Big Data Inst, Oxford, England
[7] City Univ London, Sch Policy & Global Affairs, London, England
[8] Kings Coll London, Inst Psychiatr y & Neurosci, Sch Mental Hlth & Psychol Sci, London, England
[9] Univ Bristol, Ctr Acad Primary Care, Bristol Med Sch, Canynge Hall,Whatley Rd, Bristol BS8 2PN, England