1. Department of Internal Medicine; University of Amsterdam; Academic Medical Center; Amsterdam the Netherlands
2. Department of Urology; Erasmus Medical Center; Rotterdam the Netherlands
3. Department of Surgery; Sint Lucas Andreas Hospital; Amsterdam the Netherlands
4. Department of Neurology; University of Amsterdam; Academic Medical Center; Amsterdam the Netherlands
5. Department of Internal Medicine; University Center of Geriatric Medicine; University Medical Center Groningen; Groningen the Netherlands
6. Geriatrics Section; Department of Internal Medicine; University of Amsterdam; Academic Medical Center; Amsterdam the Netherlands
7. Department of Geriatrics; Gelre Hospitals; Apeldoorn the Netherlands