1. Department of Critical Care Nursing, School of Nursing and Midwifery, Iran University of Medical Sciences, Rashid Yasemi St., Valiasr St., Tehran, Iran
2. Department of Medical-Surgical Nursing, School of Nursing and Midwifery, Iran University of Medical Sciences, Rashid Yasemi St., Valiasr St., Tehran, Iran
3. Department of Emergency Medicine, Emergency Medicine Research Center, Al-Zahra Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
4. Statistic and Mathematics Department, School of Nursing and Midwifery, Iran University of Medical Sciences, Tehran, Iran