1. Department of Emergency Medicine, Chang Bing Show Chwan Memorial Hospital, Changhua 50544, Taiwan
2. Department of Emergency Medicine, Tungs’ Taichung MetroHarbor Hospital, Taichung 43503, Taiwan
3. Department of Nursing, Jen-Teh Junior College of Medicine, Nursing and Management, Miaoli 35664, Taiwan
4. Laboratory of Epidemiology and Biostastics, Changhua Christian Hospital, Changhua 50006, Taiwan
5. Department of Pediatrics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70403, Taiwan
6. Department of Pediatric Emergency Medicine, Taichung Veteran General Hospital, Taichung 43503, Taiwan
7. Department of Pediatrics, Taichung Veteran General Hospital, Taichung 43503, Taiwan
8. Department of Post-Baccalaureate Medicine, National Chung Hsing University, Taichung 40202, Taiwan
9. College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
10. Department of Pediatrics, Chiayi Chang Gung Memorial Hospital, Chiayi 61363, Taiwan