1. Department of Emergency Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
2. Department of Family Medicine, Soonchunhyang University Hospital Seoul, Seoul, Republic of Korea
3. Department of Interdisciplinary Program in Biomidical Science, Soonchunhyang University, Asan, Republic of Korea
4. Department of Pediatrics, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Republic of Korea
5. Department of Family Medicine, Konyang University Hospital, Daejeon, Republic of Korea
6. Department of Family Medicine, Soonchunghyang University Cheonan Hospital, Cheonan, Republic of Korea
7. Department of Biological Science, Northwestern University, Ewanston, IL, USA