Colitis, CollagenousCollagen DiseasesColitis, MicroscopicColitisColitis, LymphocyticColitis, UlcerativeColonDiarrheaBudesonideSulfasalazineLoperamideColonoscopyColestipolAntidiarrhealsIntestinal MucosaLymphocytosisProtein-Losing EnteropathiesGastrointestinal AgentsSigmoidoscopyAnti-Inflammatory AgentsRectumMesalamineCeliac DiseaseCholestyramine ResinColitis, IschemicFrozen SectionsCollagenBiopsyDextran SulfateTrinitrobenzenesulfonic Acid