This collection consists of PEDSnet High Impact Rapid Research (HIRR) projects and their resulting publications. These projects take place on an accelerated timeline, producing results for publication within 90 days of the study start date. This research focuses on "hot-topics" in medicine, or contemporary issues and trends in pediatrics for which real world data can provide meaningful insight. Research topics are identified by the PEDSnet Rapid Research Reports Workgroup.