1. Department of Infectious Diseases, Internal Medicine, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8574, Japan
2. Department of Intelligent Network for Infection Control, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan
3. Division of Infection Control, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8574, Japan
4. Department of Laboratory Medicine, Tohoku University Hospital, 1-1 Seiryo-machi, Apba-ku, Sendai, Miyagi 980-8574, Japan
5. Department of Microbiology and Infectious Diseases, Nara Medical University, 840 Shijo-Cho, Kashihara, Nara 634-8521, Japan