[1] Vrije Univ Brussel, End Of Life Care Res Grp, B-1090 Brussels, Jette, Belgium
[2] Univ Ghent, B-1090 Brussels, Jette, Belgium
[3] Vrije Univ Amsterdam, Med Ctr, Dept Publ & Occupat Hlth, EMGO Inst Hlth & Care Res, NL-1081 BT Amsterdam, Netherlands
[4] Vrije Univ Amsterdam, Med Ctr, Expertise Ctr Palliat Care, NL-1081 BT Amsterdam, Netherlands