1. Institut de Biomecanique Humaine Georges Charpak, Paris, France
2. Instituto Politécnico Rua Bonfim, Universidade Estadual do Rio de Janeiro, Nova Friburgo, RJ, Brazil
3. Department of Orthopaedic Surgery, Hopital Bichat-Beaujon, Assistance Publique-Hôpitaux de Paris, Clichy, France