1. Department of Medical Oncology; ZNA Middelheim; Antwerp Belgium
2. Department of Geriatric Medicine; University Hospitals Leuven; Leuven Belgium
3. Department of General Medical Oncology; University Hospitals Leuven; Leuven Belgium
4. Department of Medical Oncology; Oncologisch Centrum, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel; Brussels Belgium
5. Consultant in Statistics; Beernem Belgium
6. Department of Clinical and Experimental Medicine; KU Leuven; Leuven Belgium
7. Department of Public Health and Primary Care; Health Services and Nursing Research, KU Leuven; Leuven Belgium
8. Department of Oncology; KU Leuven; Leuven Belgium