1. Department of Midwifery and Reproductive Health, School of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2. Department of Midwifery, Sirjan School of Medical Sciences, Sirjan, Iran
3. Reproductive Health, and Midwifery Department, Tehran University of Medical Sciences, Tehran, Iran
4. Department of Biostatistics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
5. Department of Nursing, Sirjan School of Medical Sciences, Sirjan, Iran