1. Center for Human Movement Sciences, University Medical Center Groningen, University of Groningen, Groningen
2. Department of Orthopedics, University Medical Center Groningen, University of Groningen, Groningen
3. Department of Orthopaedic Surgery & Trauma, Catharina Hospital, Eindhoven
4. Department of Orthopaedic Surgery & Trauma, Máxima Medical Center, Veldhoven
5. Department of Rehabilitation Medicine, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands