1. Department of Preventive Medicine, College of Medicine, Hanyang University, Seoul 04763, Republic of Korea
2. Institute for Health and Society, Hanyang University, Seoul 04763, Republic of Korea
3. Department of Preventive Medicine, Chonnam National University Medical School, Gwangju 61186, Republic of Korea
4. Department of Preventive Medicine, Institute of Occupational Medicine, Yonsei Wonju College of Medicine, Wonju 26493, Republic of Korea
5. Department of Preventive Medicine and Public Health, College of Medicine, Yonsei University, Seoul 03722, Republic of Korea
6. Department of Internal Medicine, Hanyang University Hospital, Seoul 04763, Republic of Korea