1. Department of Otolaryngology-Head and Neck Surgery; Columbia University, College of Physicians and Surgeons; New York New York
2. Department of Neurology; Icahn School of Medicine at Mt. Sinai; New York New York
3. New York Center for Voice and Swallowing Disorders; New York New York
4. Department of Neurology; the University of California, Irvine; Irvine California
5. Allergan, PLC; Dublin Republic of Ireland
6. Department of Otolaryngology; Massachusetts Eye and Ear Infirmary, Harvard Medical School; Boston Massachusetts
7. Department of Neurology; Massachusetts General Hospital; Boston Massachusetts