1. Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido University
2. Laboratory of Biomolecular Science, Faculty of Pharmaceutical Sciences, Hokkaido University
3. Laboratory of Synthetic and Industrial Chemistry, Faculty of Pharmaceutical Sciences, Hokkaido University
4. Division of Molecular Virology, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo
5. Department of Immunochemistry, Research Institute for Microbial Diseases, Osaka University