1 Department of Hepatology, Osaka City University Graduate School of Medicine, 1-4-3, Asahimachi, Abeno, Osaka, 545-8585, Japan. enomoto-m@med.osaka-cu.ac.jp.
2 Department of Hepatology, Osaka City University Graduate School of Medicine, 1-4-3, Asahimachi, Abeno, Osaka, 545-8585, Japan.