1. Department of Pulmonary Medicine, Graduate School of Medical Science Kyoto Prefectural University of Medicine Kyoto Japan
2. Department of Respiratory Medicine Japanese Red Cross Kyoto Daiichi Hospital Kyoto Japan
3. Department of Pulmonary Medicine Japan Community Health care Organization Kyoto Kuramaguchi Medical Center Kyoto Japan
4. Department of Respiratory Medicine Japanese Red Cross Kyoto Daini Hospital Kyoto Japan
5. Department of Respiratory Medicine Uji‐Tokushukai Medical Center Kyoto Japan
6. Department of Pulmonary Medicine Otsu City Hospital Shiga Japan