1 Orthopedics and Traumatology Department, CHU Sud, 270, boulevard Sainte-Marguerite, 13009 Marseille, France; Institute of Movement Sciences UMR 7287, CNRS, Aix-Marseille Université, 13000 Marseille, France. Electronic address: xavier.flecher@gmail.com.
2 University of Lille, Hauts de France, 59000 Lille, France; Orthopedics Department, Roger-Salengro Hospital, CHRU de Lille, place de Verdun, 59000 Lille, France.