Department of Endoscopy The Jikei University School of Medicine 3-25-8 Nishi Shinbashi Minato-ku Tokyo 105-8461 Japan;
Division of Oncology Research Center for Medical Science 3-25-8 Nishi Shinbashi Minato-ku Tokyo 105-8461 Japan;
Department of Endoscopy The Jikei University School of Medicine 3-25-8 Nishi Shinbashi Minato-ku Tokyo 105-8461 Japan;
Division of Oncology Research Center for Medical Science 3-25-8 Nishi Shinbashi Minato-ku Tokyo 105-8461 Japan;
Division of Gastroenterology and Hepatology Department of Medicine Nihon University School of Medicine 30-1 Oyaguchikami-cho Itabashi-ku Tokyo 173-8610 Japan;
Department of Endoscopy The Jikei University School of Medicine 3-25-8 Nishi Shinbashi Minato-ku Tokyo 105-8461 Japan;