1 Department of Gastroenterology, Tokyo Women's Medical University Yachiyo Medical Center, Chiba, 276-8524, Japan; Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, Tokyo, Japan. Electronic address: daisuke.murakami@gmail.com.
2 Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, Tokyo, Japan.
3 Department of Gastroenterology, Tokyo Women's Medical University Yachiyo Medical Center, Chiba, 276-8524, Japan.