Lupus Erythematosus, SystemicPanniculitis, PeritonealLupus NephritisHistiocytosisLupus Erythematosus, DiscoidLupus Erythematosus, CutaneousAntibodies, AntinuclearErythema NodosumErythema InduratumPanniculitis, Lupus ErythematosusAutoantibodiesPancreatitis, AlcoholicHistiocytesLupus Vasculitis, Central Nervous SystemCytophagocytosisPrednisoloneSkin DiseasesErythemaMice, Inbred NZBHydroxychloroquineAntibodies, AnticardiolipinGnathostomiasisImmunosuppressive AgentsAntibodies, AntiphospholipidMice, Inbred MRL lprAntiphospholipid SyndromeAutoantigensAutoimmune DiseasesPanniculitis, Nodular NonsuppurativeImmunoglobulin GPanniculitisDermatomyositisComplement C4BiopsysnRNP Core ProteinsAntigen-Antibody ComplexAutoimmunitySkinLupus Coagulation InhibitorRemission, SpontaneousFatal OutcomeRheumatic DiseasesLymphoma, T-Cell, CutaneousArthritis, RheumatoidSeverity of Illness IndexComplement C1qNephritisPancreatitis, Acute NecrotizingSjogren's SyndromePhotosensitivity DisordersB-LymphocytesComplement C3RNA, Small CytoplasmicDNAImmunoglobulin MCase-Control StudiesConnective Tissue DiseasesEnzyme-Linked Immunosorbent AssayGenetic Predisposition to DiseaseCardiolipinsSyndromeB-Cell Activating FactorCollagen DiseasesMixed Connective Tissue DiseaseComplement C4aGlomerulonephritisalpha 1-AntitrypsinCyclosporineSerositisScleroderma, Systemicbeta 2-Glycoprotein IRibonucleoproteinsRibonucleoproteins, Small NuclearBiological MarkersProteinuriaComplement System ProteinsTomography, X-Ray ComputedVasculitisAntibody SpecificityT-LymphocytesLupus VulgarisCryoglobulinsRisk FactorsAzathioprineAdrenal Cortex HormonesReceptors, IgGPlasmapheresisMethylprednisoloneKidneyB-Lymphocyte SubsetsInterferon Regulatory FactorsPolymorphism, Single NucleotideAntibodiesLymphocyte ActivationPrednisoneAntibodies, MonoclonalKidney GlomerulusComplement C4bGlucocorticoidsCohort Studies