1. Department of Orthopedic Surgery, Noordwest Ziekenhuisgroep, Alkmaar, the Netherlands
2. Specilized Centre for Orthopeadic Research & Education (SCORE), Department of Orthopedic Surgery, Xpert Clinics, Amsterdam, the Netherlands
3. Department of Orthopedics and Traumatology, St.-Antonius-Hospital Kleve, Kleve, Germany
4. Department of Orthopedic Surgery, Spaarne Gasthuis Academy, Hoofddorp, the Netherlands