[1] Vrije Univ Brussel, End Of Life Care Res Grp, B-1090 Brussels, Belgium
[2] Univ Ghent, Heymans Inst Pharmacol, B-9000 Ghent, Belgium
[3] Univ Ghent, Bioeth Inst Ghent, B-9000 Ghent, Belgium
[4] Univ Hosp Brussels, Dept Med Oncol, Brussels, Belgium
[5] Univ Antwerp Hosp, Dept Pulm Med, Edegem, Belgium
[6] ZNA Middelheim Hosp, Dept Pulm Med, Antwerp, Belgium
[7] Hosp Sint Augustinus, Dept Pulm Med, Antwerp, Belgium
[8] Vrije Univ Amsterdam Med Ctr, EMGO Inst Hlth & Care Res, Dept Publ & Occupat Hlth, Amsterdam, Netherlands