1 Department of Gastroenterology and Hepatology, Sapporo Medical University of Medicine, S-1, W16, Chuoku, Sapporo, Hokkaido, 060-8543, Japan.
2 Center for Translational Research, The Institute of Medical Science, The University of Tokyo, Tokyo, 108-8639, Japan.
3 Department of Gastroenterology and Hepatology, Sapporo Medical University of Medicine, S-1, W16, Chuoku, Sapporo, Hokkaido, 060-8543, Japan. hiropynakase@gmail.com.