1. Division of General Internal Medicine, Department of Internal Medicine, Section Geriatric Medicine, Maastricht University Medical Centre, P.O. Box 5800, NL-6202 AZ, Maastricht, The Netherlands
2. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Maastricht University Medical Centre, P.O. Box 5800, NL-6202 AZ, Maastricht, The Netherlands
3. Department of Vascular and Internal Medicine, Diabetes Center, Amsterdam University Medical Centre, P.O. Box 22660, NL-1100 DD, Amsterdam, The Netherlands
4. Division of General Internal Medicine, Department of Internal Medicine, Section Geriatric Medicine, Maastricht University Medical Centre, P.O. Box 5800, NL-6202 AZ, Maastricht, The Netherlands