title: Author's response.
authors.forename: Fabio
authors.initials: F
authors.lastname: Cerza
authors.forename: Alessandro
authors.initials: A
authors.lastname: Carcangiu
mesh_terms: D005260:Female; D006801:Humans; D006820:Hyaluronic Acid / Q000627:therapeutic use*; D008297:Male; D020370:Osteoarthritis, Knee / Q000188:drug therapy*; D053657:Platelet-Rich Plasma; D055675:Viscosupplements / Q000627:therapeutic use*
chemical_list: D055675:Viscosupplements; D006820:Hyaluronic Acid