[1] Katholieke Univ Leuven Hosp, Dept Gen Med Oncol, Louvain, Belgium
[2] Katholieke Univ Leuven Hosp, Digest Oncol Unit, Louvain, Belgium
[3] Katholieke Univ Leuven Hosp, Dept Haematol, Louvain, Belgium
[4] Katholieke Univ Leuven Hosp, Resp Oncol Unit, Louvain, Belgium
[5] Katholieke Univ Leuven Hosp, Dept Gynaecol Oncol, Louvain, Belgium
[6] Katholieke Univ Leuven Hosp, Dept Geriatr, Louvain, Belgium
[7] Catholic Univ Louvain, Ctr Hlth Serv & Nursing Reserach, B-3000 Louvain, Belgium