1. Department of Orthopedic Surgery and Trauma, Hôpital Pierre-Paul Riquet, Toulouse, France
2. Department of Radiology, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
3. Department of Orthopedic Surgery, Hôpital des Enfants, Toulouse, France
4. Department of Epidemiology, Health Economics and Public Health, UMR1027 INSERM-Université de Toulouse III, Centre Hospitalier Universitaire de Toulouse, Toulouse, France