[1] Univ York, York YO10 5DD, N Yorkshire, England
[2] Univ York, Dept Hlth Sci, York, N Yorkshire, England
[3] Univ York, Ctr Hlth Econ, York, N Yorkshire, England
[4] Univ York, Social Policy Res Unit, York, N Yorkshire, England
[5] Univ York, Sch Business & Soc, York, N Yorkshire, England
[6] Univ York, Ctr Reviews & Disseminat, York, N Yorkshire, England
[7] Bradford Teaching Hosp NHS Fdn Trust, Bradford, England
[8] Univ York, Dept Hlth Sci, Paediat Palliat Care & Med Complex Grp, York, N Yorkshire, England
[9] Univ Leeds, Leeds Inst Data Analyt, Leeds, W Yorkshire, England
[10] Univ Hull, Wolfson Palliat Care Res Ctr, Hull York Med Sch, Kingston Upon Hull, England
[11] Bangor Univ, Sch Med & Hlth Sci, Bangor, Wales
[12] Cardiff & Vale Univ Hlth Board, All Wales Paediat Palliat Care Network, Cardiff, Wales
[13] Swansea Univ, Coll Human & Hlth Sci, Swansea, Wales
[14] Bradford Hosp Natl Hlth Serv Trust, Bradford, England
[15] Manchester Univ Natl Hlth Serv Fdn Trust, Manchester, Lancs, England
[16] Kings Coll London, Cicely Saunders Inst, London, England
[17] Kings Coll London, Dept Womens & Childrens Hlth, London, England