1. Mercy Clinic Ear, Nose, and Throat, Mercy Hospital St. Louis, St. Louis, Missouri, USA.
2. Norelle Health, New York, New York, USA.
3. Otolaryngology and Facial Plastic Surgery Associates, Fort Worth, Texas, USA.
4. Department of Otolaryngology-Head and Neck Surgery, Tufts Medical Center, Boston, Massachusetts, USA.