1. Departments of General Internal Medicine and Rheumatology, Nagasaki Medical Center, Omura City, Nagasaki, Japan
2. Departments of Hematology, Nagasaki Medical Center, Omura City, Nagasaki, Japan
3. Departments of Respiratory Medicine, Nagasaki Medical Center, Omura City, Nagasaki, Japan
4. First Department of Internal Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
5. Departments of Pathology, Nagasaki Medical Center, Omura City, Nagasaki, Japan