1. Department of Epidemiology, Infectious Diseases Control and Prevention, Graduate School of Biomedical and Health Sciences Hiroshima University Hiroshima Japan
2. Epidemiological Monitoring Unit Khorezm Regional Center to fight againt HIV/AIDS, Khorezm Region Urgench Uzbekistan
3. Department of Hepatology, Scientific Research Institute of Virology Ministry of Health of Uzbekistan Tashkent Uzbekistan
4. Department of Nephrology Hiroshima University Hospital Hiroshima Japan