1. Division of Respiratory Medicine, Department of Internal Medicine, Shiga University of Medical Science, Shiga, Japan;
2. Division of Respiratory Medicine, Toyosato Hospital, Shiga, Japan;
3. Department of Respiratory Medicine, Kohka Public Hospital, Shiga, Japan;
4. Department of Respiratory Medicine, Japan Community Healthcare Organization (JCHO), Shiga Hospital, Shiga, Japan;
5. Division of Dermatology, Shiga University of Medical Science, Shiga, Japan