1. Department of Physical Medicine and Rehabilitation; University of Pittsburgh School of Medicine; Pittsburgh Pennsylvania USA
2. Department of Otolaryngology-Head and Neck Surgery; Drexel University College of Medicine; Philadelphia Pennsylvania USA
3. Sidney Kimmel Medical College; Philadelphia Pennsylvania USA
4. Department of Otolaryngology; University of Pittsburgh School of Medicine; Pittsburgh Pennsylvania USA
5. Department of Otolaryngology-Head & Neck Surgery; Weill Cornell Medical College; New York New York USA
6. Ear, Nose and Throat Institute; Case Western Reserve University; Cleveland Ohio USA
7. Department of Neurology; Hofstra North Shore LIJ School of Medicine; Hempstead New York USA
8. Department of Neurology; Weill Cornell Medical College; New York New York USA
9. Department of Physical Medicine and Rehabilitation; Indiana University School of Medicine; Indianapolis Indiana USA
10. Department of Neurology; University of Kansas Medical Center; Kansas City Kansas USA