title: Rheumatic rarities. Preface.
authors.affiliation: Rheumatology Center, Memorial Campus, UMass Memorial Medical Center, 119 Belmont Street, Worcester, MA 01605, USA. jonathan.kay@umassmemorial.org
authors.forename: Jonathan
authors.initials: J
authors.lastname: Kay
mesh_terms: D006801:Humans; D035583:Rare Diseases / Q000175:diagnosis / Q000453:epidemiology / Q000503:physiopathology / Q000628:therapy; D012196:Review Literature as Topic; D012216:Rheumatic Diseases / Q000175:diagnosis / Q000453:epidemiology / Q000503:physiopathology / Q000628:therapy