Fluorescent Treponemal Antibody-Absorption TestLupus Erythematosus, SystemicCardiolipinsAntibodiesLupus NephritisAntibodies, AntinuclearAntibody SpecificityAutoantibodiesAntibodies, ViralAntibodies, MonoclonalAntibodies, BacterialTransferases (Other Substituted Phosphate Groups)Antibody FormationAntibodies, AnticardiolipinAntibodies, AntiphospholipidAntibodies, NeutralizingPhospholipidsImmunoglobulin GLupus Vasculitis, Central Nervous SystemAntibody AffinityFluorescent Antibody TechniqueAntiphospholipid SyndromeLupus Erythematosus, DiscoidAntibodies, Anti-IdiotypicImmunoglobulin MBinding Sites, Antibodybeta 2-Glycoprotein IAntigen-Antibody ComplexMice, Inbred NZBAutoantigensAutoimmune DiseasesPhosphatidylglycerolsEpitopesCross ReactionsMice, Inbred MRL lprLupus Coagulation InhibitorEnzyme-Linked Immunosorbent AssayHIV AntibodiesB-LymphocytesHydroxychloroquineMolecular Sequence Data