1. Department of Internal Medicine; Erasmus MC; Rotterdam The Netherlands
2. Department of Epidemiology; Erasmus MC; Rotterdam The Netherlands
3. Department of Radiology; Erasmus MC; Rotterdam The Netherlands
4. Park Nicollet Clinic and HealthPartners Institute; HealthPartners, Inc.; Minneapolis MN USA
5. Musculoskeletal Research Unit; School of Clinical Science; University of Bristol, Southmead Hospital; Bristol UK
6. Department of Orthopedics; Erasmus MC; Rotterdam The Netherlands