1. Department of Pediatrics, National Hospital Organization Yonago Medical Center, Yonago 683-0006, Japan
2. Department of Respiratory Medicine, National Hospital Organization Yonago Medical Center, Yonago 683-0006, Japan
3. Department of Internal Medicine, National Hospital Organization Yonago Medical Center, Yonago 683-0006, Japan
4. Division of Respiratory Medicine and Rheumatology, Department of Multidisciplinary Internal Medicine, School of Medicine, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan