1 Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Maternal-Fetal Neonatal Research Center, Tehran University of Medical Sciences, Valiasr Hospital, Tehran, Iran.
2 Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Tehran University of Medical Sciences, Shariati Hospital, Tehran, Iran. salehmaasoumeh@yahoo.com.
3 Department of Community Medicine, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran.