1. University of Medical Sciences , Shiraz , Iran
2. Department of Midwifery, Chalous Branch , Islamic Azad University , Chalous , Iran
3. Midwifery and Reproductive Health Research Center , Department of Midwifery and Reproductive Health, School of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences , Vali-Asr Avenue, Cross of Vali-Asr and Neiaiesh Highway, Opposite to Rajaee Heart Hospital , Tehran 1996835119, Iran
4. Department of Public Health, Faculty of Health , Shahid Beheshti University of Medical Sciences , Tehran , Iran
5. Department of Biostatistics, Faculty of Paramedicine , Shahid Beheshti University of Medical Sciences , Tehran , Iran