[1] Norwegian Univ Sci & Technol, NTNU, European Palliat Care Res Ctr PRC, Dept Canc Res & Mol Med,Fac Med, POB 8905, N-7491 Trondheim, Norway
[2] Univ Trondheim Hosp, St Olavs Hosp, POB 8905, N-7491 Trondheim, Norway
[3] Univ Trondheim Hosp, St Olavs Hosp, Canc Clin, Trondheim, Norway
[4] Haukeland Hosp, Reg Ctr Excellence Palliat Care, Bergen, Norway
[5] Norwegian Univ Sci & Technol, Dept Sociol & Polit Sci, Trondheim, Norway
[6] Oslo Univ Hosp, Dept Oncol, Oslo, Norway
[7] Univ Oslo, Oslo, Norway
[8] Oslo Univ Hosp, Dept Oncol, Reg Ctr Excellence Palliat Care, Oslo, Norway