[1] Univ Ghent, Heymans Inst Pharmacol, Clin Pharmacol Res Unit, De Pintelaan 185,Blok B 1st Floor, B-9000 Ghent, Belgium
[2] VUB, End Of Life Care Res Grp, Brussels, Belgium
[3] Univ Ghent, Brussels, Belgium
[4] Norwegian Univ Sci & Technol NTNU, Dept Canc Res & Mol Med, European Palliat Care Res Ctr PRC, Fac Med, Trondheim, Norway
[5] Oslo Univ Hosp, Reg Advisory Unit Palliat Care, South Eastern Norway, Oslo, Norway
[6] Trondheim Reg & Univ Hosp, St Olavs Hosp, Canc Clin, Trondheim, Norway
[7] Univ Antwerp, Dept Nursing & Midwifery Sci, CRIC, Fac Med & Hlth Sci, Antwerp, Belgium
[8] Ghent Univ Hosp, Dept Med Oncol, Ghent, Belgium