1. Department of Gastroenterology and Hepatology, School of Medicine, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia.
2. Genome Medical Sciences Project, National Center for Global Health and Medicine, Ichikawa, Chiba, Japan.
3. Department of Viral Pathogenesis and Controls, National Center for Global Health and Medicine, Ichikawa, Chiba, Japan.
4. Laboratory Department, Intermed Hospital, Ulaanbaatar, Mongolia.
5. Department of Molecular Biology, Bonavita Clinical Laboratory, Ulaanbaatar, Mongolia.
6. Department of Graduate Education, Graduate School, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia.
7. Department of Public Health and Office of Medical Education, School of Medicine, International University of Health and Welfare, Japan.
8. AIDS Clinical Center, National Center for Global Health and Medicine, Toyama, Tokyo, Japan.