1. Universidade Federal de São Paulo; Department of Orthopaedics and Traumatology; Rua Borges Lagoa, n 783, 5° andar São Paulo Brazil 04038-032
2. Faculdade Israelita de Ciencias da Saude Albert Einstein and Hospital Israelita Albert Einstein; Orthopaedic Department and School of Medicine; Av. Albert Einstein, 627/701 São Paulo São Paulo Brazil CEP 05651-901