[1] Northwick Pk Hosp & Clin Res Ctr, Reg Rehabil Unit, London, England
[2] Kings Coll London, Cicely Saunders Inst, Dept Palliat Care Policy & Rehabil, London WC2R 2LS, England
[3] Univ Western Australia, Ctr Musculoskeletal Studies, Perth, WA 6009, Australia