1. National Cancer Center Hospital East, Department of Gastroenterology and Endoscopy, Kashiwa, Japan
2. Tokyo University of Science, Department of Materials Science and Technology, Tokyo, Japan
3. National Cancer Center, Exploratory Oncology Research and Clinical Trial Center, Chiba, Japan
4. Tokyo University of Science, Department of Mechanical Engineering, Chiba, Japan
5. Tokyo University of Science, Research Institute for Biomedical Sciences, Chiba, Japan
6. RIKEN Center for Advanced Photonics, Saitama, Japan
7. National Cancer Center Hospital East, Department of Pathology and Clinical Laboratories, Kashiwa, Japan
8. National Cancer Center Hospital East, Department of Gastric Surgery, Chiba, Japan
9. Yokohama City University Graduate School of Medicine, Department of Gastroenterology, Yokohama, Japan