[1] Univ Cambridge, Primary Care Unit, Cambridge, England
[2] Univ Cambridge, Ctr Family Res, Cambridge, England
[3] Kings Coll London, London, England
[4] Cambridgeshire & Peterborough NHS Fdn Trust, Peterborough, Cambs, England
[5] Cambridge Univ Hosp NHS Fdn Trust, Cambridge, England
[6] RAND Europe, Cambridge, England