1. Department of Microbiology, Juntendo University School of Medicine, Tokyo, Japan
2. Department of Infectious Diseases, Research Institute, National Center for Global Health and Medicine, Tokyo, Japan
3. Division of Clinical Laboratory and Blood Transfusion, University Hospital of the Ryukyus, Okinawa, Japan
4. Department of Infectious Diseases, Respiratory, and Digestive Medicine, Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan
5. Control and Prevention of Infectious Disease, University Hospital of the Ryukyus, Okinawa, Japan
6. Nakagami General Hospital, Okinawa, Japan