Document Type : Original Article
Authors
1 Lecturer of Midwifery, School of Nursing and Midwifery, Mashhad University of Medical Sciences, Mashhad, Iran.
2 Lecturer of Midwifery, School of Nursing and Midwifery, North Khorasan University of Medical Sciences, Bojnord, Iran.
3 Associate professor, Department of Biostatistics and Epidemiology, Health Sciences Research Center, School of Public Health, Mashhad University of Medical Sciences, Mashhad, Iran.
Abstract
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