MesalamineAnti-Inflammatory Agents, Non-SteroidalColitis, UlcerativeProctitisSuppositoriesSulfasalazineColitis, CollagenousGastrointestinal AgentsAminosalicylic AcidsBinomial DistributionDelayed-Action PreparationsPhenylhydrazines6-MercaptopurineBerylliumBerylliosisHydrogen SulfideColonBudesonideAzathioprineCapsulesAnti-Inflammatory AgentsRemission InductionCrohn DiseaseChemistry, PharmaceuticalDouble-Blind MethodMedication Adherence