1. Department of Biomedical Sciences for Health, University of Milan
2. Unit of Clinical Epidemiology, IRCCS Galeazzi Orthopedic Institute, Milan
3. Center of Biostatistics for Clinical Epidemiology, School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
4. Scientific Directorate, IRCCS Galeazzi Orthopedic Institute
5. Vita – Salute San Raffaele University, Milan