title: Introduction: osteoarthritis in the third millennium: a new era for an old disease?
authors.affiliation: Rheumatology Unit, L Sacco University Hospital, Milan, Italy.
authors.forename: Mario
authors.initials: M
authors.lastname: Carrabba
authors.forename: Piercarlo
authors.initials: P
authors.lastname: Sarzi-Puttini
mesh_terms: D018450:Disease Progression; D006801:Humans; D007596:Joints / Q000473:pathology* / Q000503:physiopathology; D010003:Osteoarthritis / Q000209:etiology / Q000503:physiopathology* / Q000628:therapy; D012219:Rheumatology / Q000639:trends*