1. Department of Midwifery, School of Nursing and Midwifery Iran University of Medical Sciences Tehran Iran
2. Nursing Care Research Center (NCRC), Department of Midwifery, Reproductive Health, and pregnancy, School of Nursing and Midwifery Iran University of Medical Sciences Tehran Iran
3. Department of Midwifery and Reproductive Health Tarbiat Modares University Tehran Iran
4. Department of Biostatistics, School of Public Health Iran University of Medical Sciences Tehran Iran
5. Trauma and Injury Research Center Iran University of Medical Sciences Tehran Iran
6. Department of Epidemiology, School of Public Health Iran University of Medical Sciences Tehran Iran
7. Ministry of Health and Medical Education Tehran Iran
8. Department of Obstetrics and Gynecology University Hospitals Schleswig‐Holstein Kiel Germany