1. Department of Pediatrics, Severance Children's Hospital 1 , Seoul 03722, Republic of Korea
2. Department of Emergency Medicine, Seoul National University Hospital 2 , Seoul 03080, Republic of Korea
3. Department of Biomedical Engineering, College of Medicine and Institute of Medical and Biological Engineering, Medical Research Center, Seoul National University 3 , Seoul 03080, Republic of Korea
4. Interdisciplinary Program in Bioengineering, Seoul National University Graduate School 4 , Seoul 03080, Republic of Korea