1. Department of Endoscopy, The Jikei University School of Medicine, Tokyo, Japan
2. Department of Medicine, Interdisciplinary Endoscopy, University of Erlangen-Nuremberg, Erlangen, Germany
3. Department of Neuropsychiatry, Ishikawa Prefectural Takamatsu Hospital, Ishikawa, Japan
4. Institute for Pathology, Klinikum Bayreuth, Bayreuth, Germany
5. Endoscopy Division, National Cancer Center, Tokyo, Japan
6. Department of Gastroenterology, The University of Tokyo, Tokyo, Japan
7. Department of Surgery, Osaka University, Osaka, Japan
8. Department of Internal Medicine II, Helios HSK Hospital, Wiesbaden, Germany
9. Department of Pathology, The Jikei University School of Medicine, Tokyo, Japan