1Emergency Medicine Department, Tehran University of Medical Sciences, Tehran, Iran
2Emergency Department, Imam Khomeini Complex Hospital, Tehran, Iran
3Massachusetts General Hospital, Harvard Medical School, Boston, USA
4Community Medicine Department, Tehran University of Medical Sciences, Tehran, Iran
5Medical Radiology Department, Tehran University of Medical Sciences, Tehran, Iran
6Anesthesiology Department, Tehran University of Medical Sciences, Tehran, Iran
7Prehospital Emergency Research Center, Tehran University of Medical Sciences, Tehran, Iran