1. Department of Health Informatics, Graduate School of Biomedical and Health Science, Hiroshima University, Hiroshima, Japan
2. Faculty of Education, Ganesha University of Education, Bali, Indonesia
3. Department of Health Promotion and Development Science, Graduate School of Biomedical and Health Science, Hiroshima University, Hiroshima, Japan
4. Department of General Internal Medicine, Ishii Memorial Hospital, Yamaguchi, Japan