1. Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki City, Japan
2. Department of Respiratory Medicine, Sasebo City General Hospital, Sasebo City, Japan
3. Infection Control and Education Center, Nagasaki University Hospital, Nagasaki City, Japan
4. Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki City, Japan
5. Department of Bacteriology I, National Institute of Infectious Diseases, Shinjuku City, Japan