1. Department of Orthopaedic Surgery & Trauma, Máxima Medical Centre, Veldhoven, the Netherlands
2. Department of Orthopaedic Surgery & Trauma, Catharina Hospital, Eindhoven, The Netherlands
3. Board member Dutch hip patient association Vereniging Afwijkende Heupontwikkeling, Nijkerk, the Netherlands
4. Departement of Orthopaedic Surgery, Maastricht University Medical Center, Maastricht, the Netherlands
5. Department of Orthopaedics and Sports Medicine, Erasmus MC, Sophia Children’s Hospital, Rotterdam, the Netherlands