title: Defining undifferentiated connective tissue diseases: a challenge for rheumatologists.
authors.affiliation: Rheumatology Unit, Department of Internal Medicine, University of Pisa, Pisa, Italy. marta.mosca@int.med.unipi.it
authors.forename: M
authors.initials: M
authors.lastname: Mosca
authors.forename: C
authors.initials: C
authors.lastname: Tani
authors.forename: S
authors.initials: S
authors.lastname: Bombardieri
mesh_terms: D015551:Autoimmunity / Q000276:immunology*; D003238:Connective Tissue / Q000473:pathology*; D003240:Connective Tissue Diseases / Q000175:diagnosis* / Q000276:immunology; D018450:Disease Progression; D006801:Humans