Authors
1 Assistant Professor of Otorhinolaryngology, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
2 Ibn-e- Sina Hospital, Mashhad University of Medical Sciences, Mashhad, Iran.
3 Midwifery MSc; instructor, Midwifery department, Sabzevar University of Medical Sciences, Sabzevar, Iran.
4 Advisor to the President of the University, Mashhad University of Medical Sciences, Mashhad, Iran.
5 Students Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Abstract
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