1. Department of Health Policy Science, Graduate School of Medical Science, Yamagata University, Yamagata City, Japan
2. Department of International and Community Oral Health, Tohoku University Graduate School of Dentistry, Sendai, Japan
3. Department of Clinical Research and Quality Management, University of the Ryukyus Graduate School of Medicine, Nishihara, Japan
4. Department of Health Data Science, Graduate School of Medicine, Yokohama City University, Yokohama, Japan