1. Department of Pathology; IRCCS Rizzoli Orthopaedic Institute; Bologna Italy
2. Department of Pathology and Molecular Genetics; Treviso General Hospital; Treviso Italy
3. Department of Medicine; University of Padua; School of Medicine; Padua Italy
4. Unit of Hygiene, Public Health and Biostatistics; Department of Biomedical and Neuromotor Sciences; Alma Mater Studiorum University of Bologna; Bologna Italy
5. Department of Pathology and Laboratory Medicine; Hospital for Special Surgery; New York NY USA