1. Department of Island and Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Goto
2. Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Sakamoto, Japan
3. Department of Community Medicine, Sakamoto, Japan
4. Department of Immunology and Rheumatology, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Japan
5. Clinical Research Center, Nagasaki University Hospital, Sakamoto, Japan
6. Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Japan