1. Otorhinolaryngology Research Center, Amir Alam Hospital Tehran University of Medical Sciences Tehran Iran
2. Otorhinolaryngology Research Center, Department of Otolaryngology and Head and Neck Surgery, Amiralmomenin Hospital, School of Medicine Guilan University of Medical Sciences Rasht Iran
3. Department of Pathology, Amir‐Alam Hospital Tehran University of Medical Sciences Tehran Iran
4. Department of Radiology Qom University of Medical Sciences Qom Iran