1. Department of Midwifery and Reproductive Health, School of Nursing and Midwifery, Shahid Beheshti University of Medical Science, Tehran, The Islamic Republic of Iran
2. Midwifery and Reproductive Health Research Center, Department of Midwifery and Reproductive Health, School of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, The Islamic Republic of Iran
3. Behavioral Science Research Center, School of Nursing, Baqiyatallah University of Medical Science, Tehran, The Islamic Republic of Iran
4. Department of Biostatistics, Faculty of Paramedical, Shahid Beheshti University of Medical Sciences, Tehran, The Islamic Republic of Iran