1. Department of Medicine, Queen Mary Hospital, Hong Kong, China,,
2. Institute of Virology, University of Glasgow, Scotland,,
3. Victorian Infectious Diseases References Laboratory, Melbourne, Australia,,
4. The First Department of Medicine, Chiba University, Chiba, Japan,,
5. Department of Infectious Diseases and Epidemiology, Ruijin Hospital, Shanghai Second Medical University, Shanghai, China and,
6. Institute of Hepatology, University College of London Medical School, London, United Kingdom