1 Department of Gastroenterology and Hepatology, Kitano Hospital, Osaka, Japan; Department of Gastroenterology and Hepatology, Kyoto University Graduate School of Medicine, Kyoto, Japan.
2 Department of Gastroenterology and Hepatology, Kyoto University Graduate School of Medicine, Kyoto, Japan.
3 Department of Gastroenterology and Hepatology, Kitano Hospital, Osaka, Japan.