1. Department of Preventive Medicine, College of Medicine, Korea University, Seoul, Korea.
2. Department of Public Health, Korea University, Seoul, Korea.
3. Department of Health Informatics and Management and College of Medicine, Chungbuk National University, Cheongju, Chungbuk, South Korea.
4. Department of Health Policy and Management Graduate School, Korea University, Seoul, Korea.
5. Division of Endocrinology, Diabetes, Metabolism, and Nutrition and Knowledge and Evaluation Research Unit in Endocrinology, Mayo Clinic, Rochester, Minnesota.