[1] Poole Hosp NHS Fdn Trust, Poole BH15 2JB, Dorset, England
[2] Kings Coll London, Div Asthma Allergy & Lung Biol, London, England
[3] Duke Univ, Med Ctr, Dept Med, Div Med Oncol, Durham, NC 27710 USA
[4] Flinders Univ S Australia, Dept Palliat & Support Serv, Adelaide, SA, Australia
[5] St Catherines Hosp, Scarborough, England
[6] Univ Hull, Kingston Upon Hull HU6 7RX, N Humberside, England
[7] Univ Cambridge, Dept Publ Hlth & Primary Care, Gen Practice & Primary Care Res Unit, Cambridge CB2 1TN, England
[8] Wales Canc Trials Unit, Cardiff, S Glam, Wales
[9] N Tyneside Gen Hosp, N Shields, Tyne & Wear, England
[10] Univ London Imperial Coll Sci Technol & Med, Fac Med, Natl Heart & Lung Inst, London SW7 2AZ, England
[11] Marie Curie Ctr, Penarth, S Glam, Wales
[12] Wales Canc Trials Unit, Cardiff, S Glam, Wales
[13] Nottingham Univ Hosp NHS Trust, Hayward House Macmillan Specialist Palliat Canc C, Nottingham, England
[14] N Hampshire Palliat Care Serv, Basingstoke, Hants, England
[15] Kings Coll London, London, England
[16] Cambridge Univ Hosp NHS Fdn Trust, Cambridge, England