1. Department of Health Policy and Management, Seoul National University College of Medicine, Seoul, Korea.
2. Institute of Health Policy and Management, Seoul National University Medical Research Center, Seoul, Korea.
3. Department of Public Health, Keimyung University, Daegu, Korea.
4. Big Data Steering Department, National Health Insurance Service, Wonju, Korea.
5. The People's Health Institute, Seoul, Korea.
6. Department of Clinical Epidemiology and Biostatistics, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
7. Gwanak Branch Office, National Health Insurance Service, Seoul, Korea.