1. Teesside University; Health and Social Care Institute; Middlesbrough Tees Valley UK TS1 3BA
2. Hospital Israelita Albert Einstein; Orthopaedic and Trauma Department; Av. Albert Einstein, 627/701 São Paulo Sao Paulo Brazil CEP 05651-901
3. University of Birmingham; Public Health, Epidemiology and Biostatistics; Edgbaston Birmingham UK B15 2TT