1. Department of Gastroenterology, Toyama City Hospital
2. Department of Gastroenterology, NTT Medical Center Tokyo
3. Department of Internal Medicine, Moriguchi Keijinkai Hospital
4. Department of Gastroenterology, National Hospital Organization Kochi Hospital
5. Department of Surgery, The Jikei University School of Medicine
6. Study Committee, GERD Society
7. Second Department of Internal Medicine, Osaka Medical College
8. Division of Gastroenterology, Department of Internal Medicine, Kawasaki Medical School
9. Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences