1. Division of Gastroenterology; Department of Internal Medicine; Tri-Service General Hospital; National Defense Medical Center
2. Division of General Surgery; Department of Surgery; Tri-Service General Hospital; National Defense Medical Center
3. Division of Gastroenterology; Department of Internal Medicine; Wan Fang Hospital; Taipei Medical University; Taipei
4. Graduate Institute of Medical Sciences; National Defense Medical Center
5. Bureau of Investigation; Ministry of Justice; New Taipei City Taiwan
6. Department and Graduate Institute of Microbiology and Immunology; National Defense Medical Center