1. Department of Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania
2. Department of Physical Therapy, Duquesne University, Pittsburgh, Pennsylvania
3. Department of Physical Therapy, University of Pittsburgh, Pittsburgh, Pennsylvania
4. Department of Otorhinolaryngology–Head and Neck Surgery, Mayo Clinic, Rochester, Minnesota
5. Department of Psychiatry and Psychology, Mayo Clinic, Rochester, Minnesota
6. Department of Otolaryngology, University of Pittsburgh, Pittsburgh, Pennsylvania