AutoantibodiesPrevalenceAutoantigensAntibodies, AntinuclearAutoimmune DiseasesLupus Erythematosus, SystemicImmunoglobulin GAntibody SpecificityAutoimmunityEnzyme-Linked Immunosorbent AssayPemphigusCross-Sectional StudiesRisk FactorsInsulin AntibodiesGlutamate DecarboxylaseScleroderma, SystemicMice, Inbred NZBImmunoglobulin MPemphigoid, BullousSjogren's SyndromeEpitopesDesmoglein 3Rheumatoid FactorLupus VulgarisLupus NephritisDiabetes Mellitus, Type 1Anemia, Hemolytic, AutoimmuneRNA, Small CytoplasmicThyroglobulinsnRNP Core ProteinsAge DistributionMyositisThyroiditis, AutoimmuneAge FactorsB-LymphocytesNon-Fibrillar CollagensReceptor-Like Protein Tyrosine Phosphatases, Class 8Mice, Inbred MRL lprBrazilSex DistributionCase-Control StudiesSex FactorsDesmoglein 1Iodide PeroxidaseDermatomyositisArthritis, RheumatoidRibonucleoproteinsEpitope MappingAntibodies, Antineutrophil CytoplasmicParaneoplastic SyndromesQuestionnairesHealth SurveysCoombs TestUnited StatesCross ReactionsCohort StudiesAntigen-Antibody ComplexAntibodies, MonoclonalBinding Sites, AntibodyFluorescent Antibody Technique, IndirectAntigen-Antibody ReactionsGraves DiseaseAntibodies, AnticardiolipinAntibodies, Anti-IdiotypicBiological MarkersLogistic ModelsRibonucleoproteins, Small NuclearImmunoglobulin IdiotypesPolyendocrinopathies, AutoimmuneThyroid GlandRural PopulationFluorescent Antibody TechniqueSensitivity and SpecificityRetrospective StudiesMolecular Sequence DataChinaPolymyositisUrban PopulationPregnancyVasculitisProspective StudiesSkin Diseases, VesiculobullousStiff-Person SyndromeSocioeconomic FactorsIndiaInfant, NewbornLiver Cirrhosis, BiliarySmokingSeverity of Illness IndexChronic DiseaseTime FactorsGenotypeIncidenceImmunoglobulin AThyroid DiseasesConnective Tissue DiseasesHIV InfectionsRheumatic DiseasesPopulation SurveillanceComorbidity