1. Department of Infectious Diseases, Tokyo Metropolitan Komagome Hospital, Japan
2. Bureau of International Health Cooperation, National Center for Global Health and Medicine, Japan
3. Department of Environmental Health, Harvard T.H. Chan School of Public Health, USA
4. Department of Infection Prevention and Control, Tokyo Metropolitan Komagome Hospital, Japan
5. Department of Clinical Laboratory, Tokyo Metropolitan Komagome Hospital, Japan
6. Department of Bacteriology 1, National Institute of Infectious Diseases, Japan