1. Laboratory of Applied Biomechanics, Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy
2. U.O.C. 1° Clinica Ortopedica, ASST Gaetano Pini-CTO, Milan, Italy
3. REsearch Center for Adult and Pediatric Rheumatic Diseases, Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy
4. Department of Orthopaedics and Trauma Surgery, Universitätsklinikum Bonn, Bonn, Germany
5. Orthopedic Department, San Gerardo Hospital, University of Milano-Bicocca, Milan, Italy
6. Department of Diagnostic and Interventional Radiology, IRCCS Policlinico San Donato, San Donato Milanese, Italy
7. Department of Clinical Sciences and Community Health, Laboratory of Medical Statistics, Biometry and Epidemiology “G.A. Maccaro,” Università degli Studi di Milano, Milan, Italy
8. Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy