1. Department of Internal Medicine, National Hospital Organization, Kinki-Chuo Chest Medical Center, Japan
2. Department of Infectious Diseases, National Hospital Organization, Kinki-Chuo Chest Medical Center, Japan
3. Clinical Research Center, National Hospital Organization, Kinki-Chuo Chest Medical Center, Japan
4. Department of Pathology, National Hospital Organization, Kinki-Chuo Chest Medical Center, Japan