1. Department of Radiology, Shahid Beheshti University, Tehran, Iran
2. Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
3. Faculty of Medicine, Islamic Azad University of Tonekabon, Tonekabon, Iran
4. Department of Radiology, Iran University of Medical Sciences, Tehran, Iran
5. Department of Otorhinolaryngology-Head and Neck Surgery, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran