Mostafa Rad1, Amir Mirhaghi2, Nematullah Shomoossi3. 1. School of Nursing and Midwifery, Sabzevar University of Medical Sciences, Sabzevar, Iran. Electronic address: motafarad633@yahoo.com. 2. Evidence-Based Caring Research Center, Department of Medical-Surgical Nursing, School of Nursing and Midwifery, Mashhad University of Medical Sciences, Mashad, Iran. 3. School of Medicine, Sabzevar University of Medical Sciences, Sabzevar, Iran. Electronic address: nshomoossi@yahoo.com.