1. Department of Midwifery & Reproductive Health Faculty of Nursing & Midwifery Shahid Beheshti University of Medical Sciences Tehran Iran
2. Medical student, Student Research Committee, Tabriz Branch Islamic Azad University Tabriz Iran
3. Department of Statistics and Epidemiology School of Public Health Tabriz University of Medical Sciences Tabriz Iran
4. Department of Midwifery Faculty of Nursing and Midwifery, Tabriz Branch Islamic Azad University Tabriz Iran