1. Department of Microbiology, Faculty of Medicine, Oita University, Yufu, Oita, Japan
2. Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
3. Research Center for Global and Local Infectious Diseases, Faculty of Medicine, Oita University, Yufu, Oita, Japan
4. Division of Interventional Hepatology, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh