title: Connective tissue diseases versus overlap syndrome.
mesh_terms: D000328:Adult; D001172:Arthritis, Rheumatoid / Q000175:diagnosis; D003095:Collagen Diseases / Q000175:diagnosis*; D003882:Dermatomyositis / Q000175:diagnosis; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000175:diagnosis; D008297:Male; D008875:Middle Aged; D008947:Mixed Connective Tissue Disease / Q000175:diagnosis*; D012595:Scleroderma, Systemic / Q000175:diagnosis