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