title: [Mixed connective tissue diseases or systemic lupus erythematosus?].
mesh_terms: D000368:Aged; 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*
vernacular_title: Mieszana kolagenoza (MCTD) czy toczeń rumieniowaty trzewny (SLE).