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