1. Department of Microbiology, Kanagawa Prefectural Institute of Public Health, Chigasaki, Kanagawa, Japan
2. Division of Microbiology, Osaka Institute of Public Health, Higashinari, Osaka, Japan
3. Institute of Public Health Ho Chi Minh City, Ho Chi Minh City, Vietnam
4. Research Center of Microorganism Control, Osaka Metropolitan University, Sakai, Osaka, Japan
5. Faculty of Contemporary Human Life Science, Tezukayama University, Nara, Japan
6. Graduate School of Integrated Sciences for Life,, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan