Colonic Diseases, Functional

• Internal Medicine Division of the "Cervello-Villa Sofia" Hospital — Palermo, PA, Italy
• Department of Internal Medicine, University Hospital of Palermo — Palermo, Italy

• Örebro University Hospital — Örebro, Närke, Sweden

• Medical College of Wisconsin — Milwaukee, Wisconsin, United States

• Maastricht University Medical Center — Maastricht, Limburg, Netherlands

• University of Pennsylvania — Philadelphia, Pennsylvania, United States

• ProofPilot (Virtual Study: https://p.proofpilot.com) — New York, United States

• The Children's Memorial Health Institute — Warsaw, Poland

• Children's Nutrition Research Center — Houston, Texas, United States
• Texas Children's Hospital — Houston, Texas, United States

• Children's Nutrition Research Center — Houston, Texas, United States
• Texas Children's Hospital — Houston, Texas, United States

Not specified