1. Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
2. Department of Preventive Medicine and Institute of Occupational Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
3. Institute of Genomic Cohort, Yonsei University Wonju College of Medicine, Wonju, Korea.
4. Center for Global Health and Social Medicine, Institute of Poverty Alleviation and International Development, Yonsei University, Seoul, Korea.