1. Department of Occupation Medicine; Keelung Chang-Gung Memorial Hospital; Keelung Taiwan
2. Faculty of Medicine; National Yang-Ming University; Taipei Taiwan
3. Division of Pediatric Neurosurgery; Neurological Institute; Taipei Veterans General Hospital; Taipei Taiwan
4. Department of Emergency Medicine; Chiayi Chang Gung Memorial Hospital; Chiayi Taiwan
5. Department of Emergency Medicine; Linkou Chang-Gung Memorial Hospital; Taoyuan Taiwan