1. Center for Surgery of Hip, National Institute of Traumatology and Orthopaedics, Rio de Janeiro, Brazil
2. Center for Surgery of Knee, National Institute of Traumatology and Orthopaedics, Rio de Janeiro, Brazil
3. Orthopaedic Department, Marcilio Dias Navy Hospital, Rio de Janeiro, Brazil
4. Teaching and Research Division, National Institute of Traumatology and Orthopaedics, Rio de Janeiro, Brazil
5. Department of Orthopaedics and Anaesthesiology, Ribeirão Preto Medical School, University of São Paulo, São Paulo, Brazil