[1] Norwegian Univ Sci & Technol NTNU, Dept Canc Res & Mol Med, Fac Med, European Palliat Care Res Ctr PRC, Trondheim, Norway
[2] Trondheim Reg & Univ Hosp, St Olavs Hosp, Canc Clin, Trondheim, Norway
[3] Univ Edinburgh, Edinburgh Canc Res Ctr, Edinburgh, Midlothian, Scotland
[4] Oslo Univ Hosp, Dept Oncol, Reg Advisory Unit Palliat Care, Oslo, Norway
[5] Oslo & Akershus Univ Coll Appl Sci, Dept Nursing & Hlth Promot, Fac Hlth Sci, Oslo, Norway
[6] Fac Med, Dept Lab Med Childrens & Womens Hlth, Trondheim, Norway
[7] Univ Aberdeen, Inst Appl Hlth Sci, Aberdeen, Scotland
[8] Univ Edinburgh, Sch Clin Sci, Dept Surg, Edinburgh, Midlothian, Scotland