1. The Third Department of Internal Medicine, Wakayama Medical University
2. Respiratory Medicine, Sendai Open Hospital
3. Internal Medicine, NTT East Tohoku Hospital
4. Respiratory Medicine, Tohoku Rousai Hospital
5. Division of Respiratory and Infectious Diseases, Tohoku University Graduate School of Medicine
6. The Second Department of Internal Medicine, Hiraga General Hospital
7. Division of Respirology, Department of Medicine, Kurume University School of Medicine
8. Respiratory Medicine, Nagata Hospital
9. Internal Medicine, Tsuda Hospital