1. a Department of Geriatric Medicine, Diakonessenhuis, Utrecht, The Netherlands;
2. b Department of Internal Medicine, Academic Medical Center, Amsterdam, The Netherlands;
3. c Department of Geriatric Medicine, Gelre Hospitals, Apeldoorn, The Netherlands;
4. d Department of Geriatric Medicine, Slotervaart Hospital, Amsterdam, The Netherlands;
5. e Departments of Oncology and Internal Medicine, Medical Center Alkmaar, Alkmaar, The Netherlands