1. Department of Island and Community Medicine; Nagasaki University Graduate School of Biomedical Sciences; Goto Japan
2. Department of Clinical Medicine, Institute of Tropical Medicine; Nagasaki University; Nagasaki Japan
3. Department of Community Medicine; Nagasaki University Graduate School of Biomedical Sciences; Nagasaki Japan
4. Department of Global Health, Medicine and Welfare; Nagasaki University Graduate School of Biomedical Sciences; Nagasaki Japan