1. Otolaryngology Department, Golsar Hospital, Rasht, Iran
2. Otolaryngology Department, Arya Hospital, Rasht, Iran
3. Ear, Nose, Throat–Head and Neck Research Center and Department, Hazrat Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
4. Division of Facial Plastic and Reconstructive Surgery, Department of Otolaryngology–Head and Neck Surgery, University of Toronto, Toronto, Ontario, Canada