Celiac DiseaseProtein-Losing EnteropathiesGlutensHIV EnteropathyGliadinDiet, Gluten-FreeIntestinal DiseasesDermatitis HerpetiformisLawsonia BacteriaDesulfovibrionaceae InfectionsTransglutaminasesJejunumReticulinDuodenumIntestinal MucosaEnteritisImmunoglobulin AIntestine, SmallLymphangiectasis, IntestinalMalabsorption SyndromesHLA-DQ AntigensSprue, TropicalBiopsyAutoantibodiesJejunal DiseasesHypoproteinemiaDiet TherapyPolyendocrinopathies, AutoimmuneProlaminsEnterocytesAvena sativaAtrophyLactuloseEnteropathy-Associated T-Cell LymphomaDiarrheaLymphoma, T-CellUlcerDisaccharidasesInterleukin-18 Receptor beta SubunitGenetic Diseases, X-LinkedIntestinesIntestinal NeoplasmsEndoscopy, GastrointestinalAutoimmune DiseasesJejunal NeoplasmsGastrointestinal DiseasesCapsule EndoscopyIntestinal AbsorptionSwine DiseasesSerologic TestsXyloseFontan ProcedureAntibodiesColitis, CollagenousGraft vs Host ReactionIleumImmunoglobulin GHLA-DR3 AntigenDiarrhea, InfantileIgA DeficiencyFood HypersensitivityAgammaglobulinemiaHLA-DR7 AntigenMannitolDiet, Protein-RestrictedWheat HypersensitivityHistiocytosisEnterocolitisCase-Control StudiesDuodenal DiseasesDuodenoscopyIsosporaEnzyme-Linked Immunosorbent AssayFecesPrevalenceSteatorrheaDuodenitisHypoaldosteronismAnti-Inflammatory Agents, Non-SteroidalT-LymphocytesLymphocytesHypoalbuminemia