title: Overlap between systemic lupus erythematosus and rheumatoid arthritis: is it real or just an illusion?
authors.forename: Luis M
authors.initials: LM
authors.lastname: Amezcua-Guerra
mesh_terms: D001172:Arthritis, Rheumatoid / Q000401:mortality*; D015897:Comorbidity; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000401:mortality*