[\'Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran.\', \'Nursing and Midwifery Care Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.\']
The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians