Gastroesophageal Reflux Disease

• Anniston, Alabama, United States
• Hueytown, Alabama, United States
• Huntsville, Alabama, United States
• Tallassee, Alabama, United States

• Endoscopy Centre, Prince of Wales Hospital — Hong Kong, China

• UCSF Fresno Center for Medical Education and Research — Fresno, California, United States

• Research Site — Pátrai, Achaias, Greece
• Research Site — Mesologgion, Aitoloakarnaniaia, Greece
• Research Site — Naupaktos, Aitoloakarnaniaia, Greece
• Research Site — Grinion, Aitoloakarnania, Greece

• Department of Paediatric Surgery, John Radcliffe Hospital NHS Trust — Oxford (Headington), Oxford, United Kingdom

• Longmont Medical Research Network — Longmont, Colorado, United States
• Nova Southeastern University — Fort Lauderdale, Florida, United States
• Babies and Beyond Peds — New Port Richey, Florida, United States
• Dr. Patricia Barrington, Dr. B. Abraham, PC — Snellville, Georgia, United States

• Hot Springs, Arkansas, United States
• Jonesboro, Arkansas, United States
• Little Rock, Arkansas, United States
• Little Rock, Arkansas, United States

• Children's Hospital of Alabama — Birmingham, Alabama, United States
• Children's Mercy Hospital — Kansas City, Missouri, United States

Not specified

• Lotung Poh-Ai Hospital — Lotung Town, Ilan County, Taiwan