1. Department of Surgery, Northwest Clinics Alkmaar, Alkmaar, the Netherlands
2. Trauma Research Unit, Department of Surgery, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands
3. Department of Public Health and Primary Care, Leiden University Medical Center, Leiden, the Netherlands
4. Geriatrics Section, Department of Internal Medicine, Amsterdam UMC Location AMC, Amsterdam, the Netherlands
5. Department of Orthopaedic Surgery, Elisabeth-TweeSteden Ziekenhuis, Tilburg, the Netherlands
6. Department of Public Health, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands
7. Department of Surgery, Rode Kruis Ziekenhuis, Beverwijk, the Netherlands
8. Department Trauma TopCare, Elisabeth-TweeSteden Ziekenhuis, Tilburg, the Netherlands
9. Department of Orthopaedic Surgery, Dijklander Ziekenhuis, Hoorn, the Netherlands
10. Department of Orthopaedic Surgery, Isala, Zwolle, the Netherlands