1 Infectious Disease Surveillance Center, National Institute of Infectious Diseases, Tokyo, 162-8640, Japan. arais@nih.go.jp.
2 Infectious Disease Surveillance Center, National Institute of Infectious Diseases, Tokyo, 162-8640, Japan.
3 Tokyo University of Science, Tokyo, 162-8601, Japan.
4 Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, Hanoi, Vietnam.
5 Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam.
6 Kyoto University Graduate School of Agriculture, Kyoto, 606-8502, Japan.
7 The University of Tokyo Hokkaido Forests, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Furano, Hokkaido, 079-1561, Japan.
8 Faculty of Biology, University of Science, Vietnam National University, Hanoi, Vietnam.
9 Pacific Center for Emerging Infectious Diseases Research, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, 96813, USA.
10 Chiba Institute of Science, Chiba, 388-0025, Japan.
11 Department of Veterinary Science, National Institute of Infectious Diseases, Tokyo, 162-8640, Japan.