1. Department of Bacteriology, Osaka City University Graduate School of Medicine, Osaka, Japan
2. Department of Respiratory Medicine, Osaka City University Graduate School of Medicine, Osaka, Japan
3. Research Center for Infectious Disease Sciences
4. Department of Chemotherapy and Mycoses, National Institute of Infectious Diseases, Tokyo, Japan
5. Department of Infection Control Science, Osaka City University Graduate School of Medicine, Osaka, Japan