1. Research Institute, International Medical Center of Japan, Shinjuku-ku, Tokyo 162-8655, Japan.
2. Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba 305-8577, Japan.
3. Center for Infectious Diseases, Nara Medical University, Kashihara, Nara 634-8522, Japan.
4. Immuno-Biological Laboratories, Co., Fujioka, Gunma 375-0005, Japan.
5. Laboratory of Viral Pathogenesis, Institute for Virus Research, Kyoto University, Sakyou-ku, Kyoto 606-8507, Japan.
6. Department of Infectious Diseases, The Institute of Medical Science, The University of Tokyo, Minato-ku 108-8639, Tokyo, Japan.
7. Department of Hematology and Oncology, Children's Hospital of Shizuoka Prefecture, Aoi-ku, Shizuoka 420-8660, Japan.
8. Biotherapy Institute of Japan, Koutou-ku, Tokyo, 135-0051, Japan.