1 Clinical Research Center, National Hospital Organization (NHO) Nagasaki Medical Center, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
2 Clinical Research Center, National Hospital Organization (NHO) Nagasaki Medical Center, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan; Department of Gastroenterology and Hepatology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.
3 Department of Gastroenterology and Hepatology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.
4 Clinical Research Center, National Hospital Organization (NHO) Nagasaki Medical Center, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan. Electronic address: yatsuhashi@nagasaki-mc.com.