1. Center for Clinical Epidemiology and Biostatistics, Perelman School of Medicine, University of Pennsylvania , Philadelphia, PA , USA
2. Division of Gastroenterology and Hepatology, University of Pennsylvania , Philadelphia, PA , USA
3. Division of Gastroenterology, Hepatology, and Nutrition, Children’s Hospital of Philadelphia , Philadelphia, PA , USA
4. Carelon Research , Wilmington, DE , USA
5. Janssen Research and Development, LLC , Titusville, NJ , USA
6. Center for Pharmacoepidemiology, Department of Epidemiology, University of North Carolina at Chapel Hill , Chapel Hill, NC , USA
7. Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine, University of Pennsylvania , Philadelphia, PA , USA
8. Crohn’s & Colitis Foundation , New York, NY , USA
9. Department of Pediatrics, Division of Pediatric Gastroenterology, University of North Carolina at Chapel Hill , Chapel Hill, NC , USA