Lupus Erythematosus, SystemicLupus NephritisAntibodies, AntinuclearAutoantibodiesSerumLupus Vasculitis, Central Nervous SystemLupus Erythematosus, DiscoidMice, Inbred NZBImmunoglobulin GAntibodies, AnticardiolipinMice, Inbred MRL lprAutoantigensAntiphospholipid SyndromeAutoimmune DiseasesAntibodies, AntiphospholipidSerum AlbuminHydroxychloroquineComplement C4Antigen-Antibody ComplexAutoimmunityEnzyme-Linked Immunosorbent AssaysnRNP Core ProteinsArthritis, RheumatoidBiological MarkersImmunoglobulin MRheumatic DiseasesLupus Coagulation InhibitorComplement C3Severity of Illness IndexNephritisCase-Control StudiesB-LymphocytesSjogren's SyndromeComplement C1qDNAPrednisoloneImmunosuppressive AgentsRNA, Small CytoplasmicGenetic Predisposition to DiseaseConnective Tissue DiseasesCardiolipinsB-Cell Activating FactorGlomerulonephritisAntibody SpecificityProteinuriaMixed Connective Tissue DiseaseCollagen DiseasesComplement C4aScleroderma, SystemicSerum Albumin, BovineSerositisbeta 2-Glycoprotein IKidneyT-LymphocytesRibonucleoproteins, Small NuclearRibonucleoproteinsVasculitisAntibodiesCryoglobulinsRisk FactorsComplement System ProteinsPhotosensitivity DisordersAntibodies, MonoclonalLupus Erythematosus, CutaneousDisease Models, AnimalAdrenal Cortex HormonesReceptors, IgGMethylprednisoloneAzathioprinePlasmapheresisTime FactorsKidney GlomerulusLymphocyte ActivationAntibodies, Anti-IdiotypicCohort StudiesB-Lymphocyte SubsetsGenotypeProspective StudiesPolymorphism, Single NucleotideImmunoglobulinsLupus VulgarisInterferon Regulatory FactorsPrednisoneComplement C4bGlucocorticoidsCells, CulturedComplement C2Myelitis, TransverseBiopsyRetrospective StudiesKidney DiseasesFluorescent Antibody TechniqueFlow CytometryInterferon-alphaRadioimmunoassayBlood SedimentationFollow-Up StudiesPolymorphism, GeneticRheumatoid FactorLymphocytes