1. University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
2. Department of Otolaryngology, West Virginia University, Morgantown, WV, USA
3. Division of Paediatric Otolaryngology, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, PA, USA
4. Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA, USA
5. Department of Audiology and Speech-Language Pathology, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, PA, USA
6. Department of Otolaryngology, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, PA, USA