1. Department of Gastroenterology and Hepatology Gunma University Graduate School of Medicine Gunma Japan
2. Division of Research and Development for Minimally Invasive Treatment Cancer Center School of Medicine Keio University Tokyo Japan
3. Department of Gastroenterology National Hospital Organization Tokyo Medical Center Tokyo Japan
4. Biotechnology Group Tokyo Metropolitan Industrial Technology Research Institute Tokyo Japan
5. Program in Endoscopic Oncology and Advanced Endoscopy Riverside Regional Medical Center Newport News USA
6. Department of Pathology School of Medicine Keio University Tokyo Japan