1. Department of Internal Medicine, Division of General Internal Medicine, Section Geriatric Medicine, Maastricht University Medical Centre, Maastricht, The Netherlands
2. Department of Trauma Surgery, Maastricht University Medical Centre, Maastricht, The Netherlands
3. Department of Orthopedic Surgery, Maastricht University Medical Centre, Maastricht, The Netherlands
4. Care and Public Health Research Institute (CAPHRI), Maastricht University, Maastricht, The Netherlands