1. Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, Korea
2. Department of Community and Family Medicine, Duke University, Durham, NC; Center for Novel and Exploratory Clinical Trials, Yokohama City University Hospital, Japan
3. Big Data Steering Department, National Health Insurance Service, Wonju, Korea
4. Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL