Gastroesophageal Reflux Disease

• Huntsville, Alabama, United States
• Mobile, Alabama, United States
• Phoenix, Arizona, United States
• Tucson, Arizona, United States

• Service d'hépato-gastroentérologie et oncologie digestive — Bordeaux, France
• Service d'Exploration Fonctionnelle Digestive — Lyon, France
• Institut des Maladies de l'Appareil Digestif (IMAD) — Nantes, France

• Mech-Sense, Department of Medical Gastroenterology, Aalborg University Hospital — Aalborg, Jutland, Denmark

• Seoul National University Hospital — Seoul, South Korea

• Clarian Bariatric Center/Indiana University — Indianapolis, Indiana, United States

• INDISA Clínica da Familia — Santiago, Chile

• Tropical medicine department — Cairo, Egypt

• Quality Care Medical Center Inc. — Vista, California, United States

Not specified

• Research site — Moscow, Russia