1 Department of Orthopaedic Surgey, Ospedale Maggiore "Carlo Alberto Pizzardi", Bologna, Italy.
2 Institut orthopédique, Caluire, France.
3 Department of Orthopaedic Surgery, University Hospital Centre of Saint-Etienne, EA 7424 - Inter-University Laboratory of Human Movement Science, University Lyon, University Jean Monnet, Saint Etienne, France.