[1] Univ Leeds, Sch Healthcare, Leeds, W Yorkshire, England
[2] Columbia Univ, Sch Nursing, New York, NY 10032 USA
[3] Visiting Nursing Serv New York, Ctr Home Care Policy & Res, New York, NY USA
[4] Glasgow Caledonian Univ, Sch Hlth & Life Sci, Glasgow, Lanark, Scotland
[5] Univ Manchester, Sch Nursing Midwifery & Social Work, Manchester, Lancs, England
[6] UCL, Div Psychiat, Marie Curie Palliat Care Res Dept, London, England
[7] Leeds Beckett Univ, Ctr Pain Res, Leeds, W Yorkshire, England
[8] Kings Coll London, Wolfson Ctr Age Related Dis, London, England
[9] Univ West Scotland, Sch Hlth Nursing & Midwifery, Paisley, Renfrew, Scotland