Document Type : Original Article
Authors
1 Midwifery and Reproductive Health Research Center, School of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2 Department of Midwifery, School of Medicine, North Khorasan University of Medical Sciences, Bojnurd, Iran
3 Department of Biostatistics, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
Keywords