1. Virology Unit; Viral Hepatitis Laboratory; Pasteur Institute of Morocco; Casablanca Morocco
2. Transboundary Animal Diseases Centre; Joint Faculty of Veterinary Medicine; Kagoshima University; Kagoshima Japan
3. Laboratory of Animal Hygiene; Joint Faculty of Veterinary Medicine; Kagoshima University; Kagoshima Japan
4. Department of Microbiology and Cell Biology; Tokyo Metropolitan Institute of Medical Science; Tokyo Japan