1. Department of Cardiovascular Medicine, Nagasaki University Graduate School of Biomedical Sciences , Nagasaki, 1-7-1 Sakamoto, Nagasaki, 852-8501 , Japan
2. Department of Immunology and Rheumatology, Nagasaki University Graduate School of Biomedical Sciences , Nagasaki, 1-7-1 Sakamoto, Nagasaki, 852-8501 , Japan
3. Department of Pathology, Nagasaki University Hospital , Nagasaki, 1-7-1 Sakamoto, Nagasaki, 852-8501 , Japan
4. Department of Radioisotope Medicine, Atomic Bomb Disease Institute, Nagasaki University , 1-12-4 Sakamoto, Nagasaki, 852-8523 , Japan