1. Department of Gerontology and Geriatrics; Leiden University Medical Center; Leiden the Netherlands
2. Department of Emergency Medicine; Leiden University Medical Center; Leiden the Netherlands
3. Department of Section on Acute Care, Department of Internal Medicine; Leiden University Medical Center; Leiden the Netherlands
4. Section on Acute Care, Department of Internal Medicine; Alrijne Hospital; Leiden the Netherlands
5. Department of Clinical Epidemiology; Leiden University Medical Center; Leiden the Netherlands
6. Department of Internal Medicine; Haaglanden Medical Center; Bronovo the Netherlands
7. Institute of Evidence-Based Medicine in Old Age; Leiden the Netherlands