1. Otorhinolaryngology Research Center, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
2. Division of Facial Plastic and Reconstructive Surgery, Department of Otolaryngology–Head and Neck Surgery, Stanford Hospital and Clinics, Stanford, California
3. Department of Physical and Rehabilitation Medicine, Turku University Hospital and University of Turku, Turku, Finland
4. Division of Otolaryngology–Head and Neck Surgery, Department of Surgery, University of Montreal, Montreal, Quebec, Canada