Lupus erythematosus syndrome and complete deficiency of the fourth component of complement.
D000293:Adolescent; D003165:Complement System Proteins / Q000032:analysis*; D003601:Cytotoxicity Tests, Immunologic; D005260:Female; D006461:Hemolysis; D006801:Humans; D005779:Immunodiffusion; D007153:Immunologic Deficiency Syndromes / Q000235:genetics*; D008180:Lupus Erythematosus, Systemic / Q000276:immunology*
D003165:Complement System Proteins