1. The Department of Chest Medicine, Chiba University School of Medicine, Chiba and the First Department of Medicine, Hokkaido University School of Medicine
2. Tohoku University, First Department of Medicine
3. Niigata University, Second Department of Medicine
4. Yamagata University, Department of Laboratory Medicine
5. University of Tokyo, Department of Geriatrics
6. Keio University, Department of Respiratory and Circulatory Medicine
7. Toranomon Hospital
8. National Tokyo Hospital
9. Shinshu University, First Department of Medicine
10. Fujita Health University Department of Internal Medicine
11. Higashi-Nagoya Hospital
12. Kyoto University, Chest Disease Research Institute
13. Tottori University, Third Department of Internal Medicine
14. Minami-Fukuoka Hospital