1. Laboratory of Microbiology, Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University
2. Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, The University of Tokyo
3. CREST, Japan Science and Technology Agency
4. Application Laboratory, FEI Company Japan Ltd.
5. Fine Morphology Laboratory, Department of Basic Medical Science, Institute of Medical Science, The University of Tokyo
6. Department of Pathobiological Science, School of Veterinary Medicine, University of Wisconsin-Madison