1. Management Department of Biosafety, Laboratory Animal, and Pathogen Bank, National Institute of Infectious Diseases, Tokyo, Japan
2. AIDS Research Center, National Institute of Infectious Diseases, Tokyo, Japan
3. Department of Molecular Virology, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
4. Department of Biomedicine, University Hospital Basel, Basel, Switzerland
5. Department of Life Science, Faculty of Advanced Engineering, Chiba Institute of Technology, Chiba, Japan
6. Institute of Medical Science, The University of Tokyo, Tokyo, Japan
7. Joint Research Center for Human Retrovirus Infection, Kumamoto University, Kumamoto, Japan
8. Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan