Esophageal Diseases

• Research Site — Blagoevgrad, Bulgaria
• Research Site — Burgas, Bulgaria
• Research Site — Dobrich, Bulgaria
• Research Site — Pleven, Bulgaria

• Research Site — Akita, Japan
• Research Site — Kashiwa, Chiba, Japan
• Research Site — Kisarazu, Chiba, Japan
• Research Site — Kōriyama, Fukishima, Japan

• Ireland Cancer Center at University Hospitals Case Medical Center, Case Comprehensive Cancer Center — Cleveland, Ohio, United States

Not specified

• ・ Hokkaido University Hospital (Hokkaido University Graduate School of Medicine) — Sapporo, Hokkaido, Japan

• ・ Hokkaido University Hospital (Hokkaido University Graduate School of Medicine / School of Medicine) — Sapporo, Hokkaido, Japan

• Mobile, Alabama, United States
• Phoenix, Arizona, United States
• Oakland, California, United States
• Orange, California, United States

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

• Phoenix, Arizona, United States
• Loma Linda, California, United States
• Oakland, California, United States
• Orange, California, United States

• Research Site — Leeds, Alabama, United States
• Research Site — Pheonix, Arizona, United States
• Research Site — Tucson, Arizona, United States
• Research Site — Concord, California, United States