title: Systemic lupus erythematosus and Klinefelter syndrome.
mesh_terms: D000293:Adolescent; D000744:Anemia, Hemolytic, Autoimmune / Q000209:etiology; D006801:Humans; D007621:Karyotyping; D007713:Klinefelter Syndrome / Q000150:complications* / Q000235:genetics; D008180:Lupus Erythematosus, Systemic / Q000150:complications* / Q000209:etiology; D008297:Male; D008722:Methods