1. Department of Microbiology, Faculty of Science; Kasetsart University; Bangkok Thailand
2. Center for Advanced Studies in Tropical Natural Resources; National Research University, Kasetsart University; Bangkok Thailand
3. Center of Excellence in Immunology and Immune Mediated Diseases, Department of Microbiology, Faculty of Medicine; Chulalongkorn University; Bangkok Thailand
4. Research Unit of Hepatitis and Liver Cancer, Department of Biochemistry, Faculty of Medicine; Chulalongkorn University; Bangkok Thailand