Document Type : Original Article
Authors
1 M.Sc. of Midwifery, School of Nursing and Midwifery, Mashhad University of Medical Sciences, Mashhad, Iran.
2 Lecture of Midwifery, School of Nursing and Midwifery, Mashhad University of Medical Sciences, Mashhad, Iran.
3 Professor, Department of Biostatistics, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran.
Abstract
Keywords