1. Department of Physiological Chemistry, Hiroshima University School of Medicine
2. Department of Molecular Biology, DNAX Research Institute
3. Department of Tumor Virology, Institute of Medical Science, The University of Tokyo
4. Department Molecular Biology, Keiogijuku University School of Medicine
5. Department of Dental Microbiology, Tokyo Medical and Dental College
6. Department of Virus Infection, Institute of Medical Science, The University of Tokyo