1. Amsterdam Bone Center, Movement Sciences Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
2. Dutch Institute for Clinical Auditing, Rijnsburgerweg 10, 2333 AA Leiden, The Netherlands
3. Section of Geriatric Medicine, Department of Internal Medicine, Amsterdam UMC, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
4. Amsterdam Public Health Research Institute, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
5. Department of Trauma Surgery, St. Antonius Hospital Utrecht–Nieuwegein, 3543 AZ Utrecht, The Netherlands
6. University Center of Geriatric Medicine, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
7. Knowledge Institute of the Dutch Association of Medical Specialists, Mercatorlaan 1200, 3528 BL Utrecht, The Netherlands
8. Biomedical Signals and Systems Group, University of Twente, Drienerlolaan 5, 7522 NB Enschede, The Netherlands
9. Department of Trauma Surgery, Ziekenhuisgroep Twente, Zilvermeeuw 1, 7909 PP Almelo, The Netherlands