[1] Odense Univ Hosp, Danish Knowledge Ctr Rehabil & Palliat Care, Odense, Denmark
[2] Univ Southern Denmark, Dept Clin Res, Odense, Denmark
[3] Nordsjaellands Hosp, Dept Multidis, Hillerod, Denmark
[4] Copenhagen Univ Hosp, Dept Oncol, Sect Palliat Med, Copenhagen, Denmark
[5] Rigshosp, Dept Anaesthesiol Pain & Resp Support, Neurosci Ctr, Copenhagen, Denmark
[6] Univ Copenhagen, Fac Hlth & Med Sci, Dept Clin Med, Copenhagen, Denmark
[7] Copenhagen Univ Hosp, Ctr Canc & Organ Dis, Dept Oncol, Sect Palliat Med, Copenhagen, Denmark
[8] Res Unit Gen Practice, Aarhus, Denmark
[9] Aarhus Univ, Inst Publ Hlth, Aarhus, Denmark