[1] Univ Cambridge, Gen Practice & Primary Care Res Unit, Dept Publ Hlth & Primary Care, Cambridge, England
[2] Kings Coll London, Dept Palliat Care & Policy, London WC2R 2LS, England
[3] Addenbrookes Palliat Care Team, Cambridge CB2 2QQ, England
[4] Cicely Saunders Inst, Dept Palliat Care Policy & Rehabil, London, England