1 Division of Orthopaedic Surgery, Department of Surgery, McMaster University Medical Centre, McMaster University, 1200 Main St West, 4E15, Hamilton, ON, L8N 3Z5, Canada. ayenif@mcmaster.ca.
2 Hopital de La Tour, Av. J.D. Maillard 3, Meyrin, Geneva, 1217, Geneva, Switzerland.
3 Hip Department (CAD) Gaetano Pini-CTO Orthopedic Institute, Università degli Studi di Milano, Piazza Cardinal Ferrari 1, 20122, Milan, Italy.