1. Department of Microbiology, Tokushima University Graduate School of Medical Science, Tokushima, Tokushima, Japan
2. Laboratory of Viral Genomics, Pathogen Genomics Center, National Institute of Infectious Diseases, Musashimurayama, Tokyo, Japan
3. Department of Microbiology, Yokohama City University School of Medicine, Yokohama, Kanagawa, Japan
4. Department of Microbiology, Kansai Medical University, Hirakata, Osaka, Japan