Affiliation: | 1. Department of Otolaryngology–Head and Neck Surgery, University of Toronto, St. Michael's Hospital, Toronto, Ontario, Canada;2. the University of Pittsburgh Voice Center, Division of Laryngology, Department of Otolaryngology, University of Pittsburgh School of MedicineUniversity of Pittsburgh;3. Department of Physical Medicine and Rehabilitation, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, U.S.A. |