1. Department of Pediatrics, Yeungnam University School of Medicine, Yeungnam University Hospital, Daegu, Korea.
2. Department of Pediatrics, Keimyung University School of Medicine, Daegu, Korea.
3. Department of Emergency Medicine, School of Medicine, Daegu Catholic University, Daegu, Korea.
4. Department of Pediatrics, School of Medicine, Kyungpook National University, Daegu, Korea.
5. Department of Pediatrics, Daegu Fatima Hospital, Korea.
6. Department of Emergency Medicine, School of Medicine, Kyungpook National University, Daegu, Korea.