[1] Katholieke Univ Leuven, Dept Oncol, B-3000 Leuven, Belgium
[2] Belgian Canc Registry, Res Dept, B-1210 Brussels, Belgium
[3] Vrije Univ Brussel, Univ Ziekenhuis Brussel, Dept Med Oncol, Oncol Ctr, B-1090 Brussels, Belgium
[4] AZ Groeninge, Kortrijk Canc Ctr, Div Med Oncol, B-8500 Kortrijk, Belgium
[5] Anglia Ruskin Univ, Med Technol Res Ctr MTRC, Sch Life Sci, Cambridge CB1 1PT, England
[6] Univ Plymouth, Sch Nursing & Midwifery, Plymouth PL4 8AA, England
[7] Iridium Canc Network Antwerp, Dept Geriatr Med, Sint Augustinus, B-2610 Antwerp, Belgium
[8] ULB, Inst Jules Bordet, Dept Hematol, B-1070 Brussels, Belgium
[9] Clin Univ St Luc UCLouvain, Dept Med Oncol, B-1200 Brussels, Belgium
[10] Univ Libre Bruxelles ULB, Univ Hosp Erasme, Dept Med Oncol, B-1000 Brussels, Belgium
[11] Clin CHC MontLegia, Dept Oncol, Grp Sante CHC Liege, B-4000 Liege, Belgium
[12] GHDC Grand Hop Charleroi, Dept Med Oncol, B-6000 Charleroi, Belgium
[13] Ctr Hosp Mouscron, Dept Geriatr Med, B-7700 Mouscron, Belgium
[14] AZ Klina, Dept Med Oncol, B-2930 Brasschaat, Belgium
[15] Imelda Hosp, Dept Med Oncol, B-2820 Bonheiden, Belgium
[16] CHU UCL Namur, Dept Med Oncol, B-5530 Namur, Belgium
[17] ZNA Stuivenberg, Dept Med Oncol, B-2060 Antwerp, Belgium
[18] Univ Liege, Ctr Hosp Univ Sart Tilman, Dept Med Oncol, B-4000 Liege, Belgium
[19] ZNA Middelheim, Dept Med Oncol, B-2020 Antwerp, Belgium
[20] Ctr Hosp Jolimont, Dept Med Oncol, B-7100 La Louviere, Belgium
[21] Univ Hosp Antwerp, Dept Med Oncol, B-2650 Edegem, Belgium
[22] Free Univ Brussels, Dept Geriatr Med, CHU St Pierre, B-1000 Brussels, Belgium
[23] AZ Vesalius, Dept Med Oncol, B-3700 Tongeren, Belgium
[24] Katholieke Univ Leuven, Acad Ctr Nursing & Midwifery, Dept Publ Hlth & Primary Care, B-3000 Leuven, Belgium
[25] Univ Hosp Leuven, Dept Geriatr Med, B-3000 Leuven, Belgium
[26] Katholieke Univ Leuven, Dept Publ Hlth & Primary Care, Gerontol & Geriatr, B-3000 Leuven, Belgium
[27] Univ Hosp Leuven, Dept Gen Med Oncol, B-3000 Leuven, Belgium