1. Department of Respiratory Medicine
2. Department of Respiratory Medicine and Rheumatology, Graduate School of Biomedical Sciences, Tokushima University, 3-18-15 Kuramoto-cho, Tokushima, 770-8503, Japan
3. Department of Internal Medicine
4. Department of Cardiovascular Surgery, Shikoku Central Hospital of the Mutual aid Association of Public School teachers, 2233 Kawanoe-cho, Shikoku-Chuo, 799-0193, Japan