1. Fifth Biology Section for Microbiology; First Department of Forensic Science; National Research Institute of Police Science; Kashiwa 277-0882
2. Department of Emerging Infectious Diseases; Institute of Tropical Medicine (NEKKEN); Nagasaki University; Nagasaki 852-8523
3. Laboratory of Signal Transduction; Department of Cell Biology; Institute for Virus Research; Kyoto University; Kyoto 606-8507 Japan