title: Homozygous C2 deficiency, lupus erythematosus, and anti-Ro (SSA) antibodies.
mesh_terms: D000974:Antibodies, Antinuclear / Q000032:analysis*; D003175:Complement C2 / Q000172:deficiency* / Q000235:genetics; D005260:Female; D006680:HLA Antigens / Q000235:genetics; D006801:Humans; D008179:Lupus Erythematosus, Discoid / Q000150:complications / Q000276:immunology; D008180:Lupus Erythematosus, Systemic / Q000150:complications / Q000235:genetics / Q000276:immunology*
chemical_list: D000974:Antibodies, Antinuclear; D003175:Complement C2; D006680:HLA Antigens; C035356:SS-A antibodies