1. Department of Obstetrics and Gynecology, School of Medicine and Allied Medical Sciences, Ardabil University of Medical Sciences, Ardabil, Iran.
2. Department of Orthopaedics, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.
3. Department of Anesthesiology, Medicine Faculty, Tabriz University of Medical Sciences, Tabriz, Iran.
4. Department of Neurology, Medicine Faculty, Tabriz University of Medical Sciences Tabriz, Iran.