Product Surveillance, PostmarketingUnited States Food and Drug AdministrationAdverse Drug Reaction Reporting SystemsDrug ApprovalDrug-Related Side Effects and Adverse ReactionsClinical Trials, Phase IV as TopicPopulation SurveillanceConsumer Product SafetyDrug IndustryUnited StatesIntussusceptionSafetySentinel SurveillanceVaccines, AttenuatedJapanDrug MonitoringAntirheumatic AgentsClinical Trials as TopicTreatment Outcome