1. Department of Knee Surgery, Gaetano Pini Hospital, Milan, Italy
2. 3rd Division of Infectious Diseases, University of Milan, Luigi Sacco Hospital, Milan, Italy
3. Orthopedic Unit, University of Sassari, Sassari, Italy
4. Reparative Orthopedic Surgery and Infectious Complications Unit, San Siro Clinical Institute, Galeazzi Orthopedic Institute, Milan, Italy