Lupus Erythematosus, SystemicPanniculitis, PeritonealHistiocytosisLupus Erythematosus, DiscoidLupus Erythematosus, CutaneousLupus NephritisErythema NodosumErythema InduratumAntibodies, AntinuclearPanniculitis, Lupus ErythematosusPancreatitis, AlcoholicAutoantibodiesHistiocytesLupus Vasculitis, Central Nervous SystemCytophagocytosisPrednisoloneErythemaSkin DiseasesGnathostomiasisHydroxychloroquineAntibodies, AnticardiolipinPanniculitis, Nodular NonsuppurativeMice, Inbred NZBImmunosuppressive AgentsPanniculitisAntibodies, AntiphospholipidAutoantigensAntiphospholipid SyndromeDermatomyositisAutoimmune DiseasesImmunoglobulin GMice, Inbred MRL lprBiopsyComplement C4Lupus Coagulation InhibitorLymphoma, T-Cell, CutaneousRemission, SpontaneousFatal OutcomesnRNP Core ProteinsSkinAntigen-Antibody ComplexPancreatitis, Acute NecrotizingRheumatic DiseasesAutoimmunityArthritis, RheumatoidSjogren's SyndromeComplement C1qNephritisPhotosensitivity DisordersSeverity of Illness IndexComplement C3RNA, Small CytoplasmicB-LymphocytesSyndromeDNAConnective Tissue DiseasesImmunoglobulin MCase-Control StudiesEnzyme-Linked Immunosorbent AssayGenetic Predisposition to Diseasealpha 1-AntitrypsinB-Cell Activating FactorCardiolipinsCollagen DiseasesCyclosporineMixed Connective Tissue DiseaseComplement C4aSerositisScleroderma, SystemicTomography, X-Ray ComputedLupus VulgarisGlomerulonephritisRibonucleoproteinsRibonucleoproteins, Small Nuclearbeta 2-Glycoprotein IBiological MarkersComplement System ProteinsVasculitisAntibody SpecificityT-LymphocytesCryoglobulinsProteinuriaAdrenal Cortex HormonesReceptors, IgGPlasmapheresisAzathioprineMethylprednisoloneInterferon Regulatory FactorsB-Lymphocyte SubsetsPolymorphism, Single NucleotideComplement C4bPrednisoneAntibodiesComplement C2Lymphocyte ActivationGlucocorticoidsAntibodies, MonoclonalMyelitis, TransverseKidneyAntibodies, Anti-Idiotypic