1. MSc student of midwifery, Department of Reproductive Health and Midwifery, School of Nursing and Midwifery, International Campus, Iran University of Medical Sciences, Tehran, Iran
2. Nursing Care Research Center (NCRC), Department of Reproductive Health and Midwifery, School of Nursing and Midwifery, Iran University of Medical Sciences, Tehran, Iran
3. Department of Biostatistics, School of Management and Information, Iran University of Medical Sciences, Tehran, Iran