1. RomaPro Center for Hip and Knee Arthroplasty, Polo Sanitario San Feliciano, Rome, Italy;
2. GLOBE, Italian Working Group on Evidence Based Orthopaedics, Rome;
3. Department of Management and Law, University of Rome Tor Vergata, Rome;
4. Scientific Secretariat of the Presidency, Istituto Superiore di Sanità, Rome;
5. MeSVA Department, University of L’Aquila;
6. Casa di Cura Santa Maria Maddalena, Occhiobello, RO, Italy