1. Osaka Prefectural Institute of Public Health, Osaka 537-0025, Japan
2. Institute of Public Health, 159 Hung Phu, District 8, Ward 8, Ho Chi Minh City, Vietnam
3. Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Center, Tsukuba, Ibaraki 305-0074, Japan
4. Department of Infection Metagenomics, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565-0871, Japan