Purpura, Thrombocytopenic, IdiopathicPurpura, Thrombotic ThrombocytopenicPurpura, ThrombocytopenicPurpuraPurpura, Schoenlein-HenochAutoimmune DiseasesPlatelet CountPlasma ExchangeSplenectomyThrombocytopeniaADAM ProteinsAutoantibodiesPurpura FulminansBlood PlateletsPlatelet TransfusionHemolytic-Uremic SyndromeImmunoglobulins, IntravenousPostoperative ComplicationsPlasmapheresisPregnancy Complications, HematologicDanazolRho(D) Immune GlobulinEcchymosisAntigens, Human PlateletThrombopoietinvon Willebrand FactorLupus Erythematosus, SystemicPurpura, HyperglobulinemicOklahomaImmunoglobulin GMegakaryocytesAutoimmunityTreatment OutcomeAnemia, Hemolytic, AutoimmuneAutoantigensAntibodies, Monoclonal, Murine-DerivedThrombopoiesisMetalloendopeptidasesRetrospective StudiesReceptors, ThrombopoietinThrombotic MicroangiopathiesAnemia, HemolyticImmunologic FactorsHemorrhageRecurrenceChronic DiseaseAntibodies, AntinuclearPlatelet Membrane GlycoproteinsAntibodies, MonoclonalAdrenal Cortex HormonesFatal OutcomeImmunosuppressive AgentsPrednisoloneSpleenDisseminated Intravascular CoagulationFollow-Up StudiesAcute DiseaseTime FactorsEncephalomyelitis, Autoimmune, ExperimentalT-LymphocytesSjogren's SyndromeIsoantibodiesHematologyPlasmaAntigen-Antibody ComplexMethylprednisoloneBlood TransfusionIntraoperative ComplicationsThrombocytosisB-LymphocytesHemoglobinuriaDiabetes Mellitus, Type 1NephritisImmune System DiseasesPhenazopyridineAutoimmune Diseases of the Nervous SystemLymphocyte ActivationEpistaxisMice, Inbred C57BLPlatelet Glycoprotein GPIb-IX ComplexPrednisonePlatelet AggregationDisease Models, AnimalAntibody SpecificityProspective StudiesRisk FactorsTuberculosis, SplenicPregnancyFlow CytometrySteroidsgamma-GlobulinsVasculitis, Leukocytoclastic, CutaneousMice, Inbred MRL lprGingival HemorrhageRemission InductionPancytopeniaHELLP SyndromeArthritis, RheumatoidCase-Control StudiesHematologic Diseases