1. Kinjo Gakuin University College of Pharmacy, 2–1723 Oomori, Moriyama-ku, Nagoya 463–8521, Japan
2. Department of Biochemistry, Osaka University Graduate School of Medicine, 2–2 Yamadaoka, Suita 565–0871, Japan
3. Division of Virology, Department of Microbiology and Immunology, Osaka University Graduate School of Medicine, 2–2 Yamadaoka, Suita 565–0871, Japan
4. Department of Pathology, Kinki University Faculty of Medicine, 377–2 Ohno-Higashi, Osaka-Sayama 589–8511, Japan