Affiliation: | 1. I Clinic, Rizzoli Orthopaedic Institute, Bologna, Italy 2. Orthopaedics and Traumatology, I Clinic, Rizzoli Orthopaedic Institute, University of Bologna, Bologna, Italy 3. Department of General Surgery and Orthopaedics, Villa Erbosa, Bologna, Italy 4. Orthopaedics and Traumatology, Rizzoli-Sicilia Department, Bagheria, Italy
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