[1] Univ Cambridge, Dept Publ Hlth & Primary Care, Primary Care Unit, Cambridge, England
[2] UCL, Marie Curie Palliat Care Res Dept, Div Psychiat, London, England
[3] Kings Coll London, Cicely Saunders Inst Palliat Care, Policy & Rehabil, London, England
[4] Brighton Gen Hosp, Sussex Community NHS Fdn Trust, Brighton, England
[5] Queen Mary Univ London, Whipps Cross Hosp, Acad Ctr Hlth Ageing, Barts Hlth NHS Trust, London, England
[6] Queen Mary Univ London, Wolfson Inst Populat Hlth, Ctr Psychiat & Mental Hlth, London, England
[7] Arthur Rank House Hosp, Cambridge, England