1. Research Institute for Microbial Diseases, Osaka University, Yamadaoka, Suita, Osaka, Japan.
2. National Hospital Organization, Wakayama National Hospital, Mihama-cho, Hidaka-gun, Wakayama, Japan.
3. Osaka Prefectural Medical Center for Respiratory and Allergic Diseases, Habikino, Osaka, Japan.
4. Graduate School of Pharmaceutical Sciences, Osaka University, Yamadaoka, Suita, Osaka, Japan.