Affiliation: | 1. University Center for the Elderly, University Medical Center Groningen, Groningen, The Netherlands;2. Department of Surgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands;3. Department of Geriatric Medicine, Medical Center Leeuwarden, Leeuwarden, The Netherlands;4. Department of Epidemiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands |