Klaas A. Hartholt, Nathalie van der Velde, and Tischa J. M. van der Cammen are with the Section of Geriatric Medicine, Department of Internal Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands. Klaas A. Hartholt, Esther M. M. van Lieshout, and Peter Patka are with the Department of Surgery-Traumatology, Erasmus MC, University Medical Center Rotterdam. Suzanne Polinder and Ed F. van Beeck are with the Department of Public Health, Erasmus MC, University Medical Center...