1. Clinical Research Development Unit (CRDU), Sayad Shirazi Hospital, Golestan University of Medical Sciences, Gorgan, Iran, Iran, Islamic Republic Of.
2. Student Research Committee, Golestan University of Medical Sciences, Gorgan, Iran.
3. Department of Obstetrics and Gynecology, School of Medicine, Sayyad Shirazi Hospital, Golestan University of Medical Sciences, Gorgan, Iran., Iran, Islamic Republic Of