1. Department of Medical Surgical Nursing, Tabas Faculty of Nursing, Birjand UDepartment of Medical Surgical Nursing, Tabas Faculty of Nursing, Birjand University of Medical Sciences, Birjand, Iranniversity of Medical Sciences, Birjand, Iran
2. Department of Critical Care Nursing, Faculty of Nursing & Midwifery, Tehran University of Medical Sciences, Tehran, Iran
3. Department of Biostatistics, Tarbiyat Modarres University, Tehran, Iran