1. Department of medical-surgical nursing, Nursing and Midwifery Care Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
2. Department of Cardiology, Imam Reza Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
3. Department of Nursing, School of Nursing and Midwifery, Neyshabour University of Medical Sciences, Neyshabour, Iran