1. Center for Motility and Functional Gastrointestinal Disorders, Boston Children’s Hospital, Boston, Massachusetts
2. Division of Gastroenterology, Hepatology, and Nutrition, Nationwide Children’s Hospital, Columbus, Ohio
3. Department of Pediatrics, Miller School of Medicine, University of Miami, Miami, Florida
4. Department of Anesthesiology, Critical Care and Pain Medicine, Boston Children’s Hospital, Boston, Massachusetts
5. Department of Psychology, Stanford University, Stanford, California
6. Division of Gastroenterology, Hepatology, and Nutrition, Children’s Mercy Kansas City, Kansas City, Missouri
7. Program in Placebo Studies, Beth Israel Deaconess Medical Center, Boston, Massachusetts
8. Psychology Department, Endicott College, Beverly, Massachusetts