1. Department of Communication Disorders and member. Craniofacial Treatment and Research Centre, The Hospital for Sick Children, Division of Speech Pathology, Faculty of Medicine, and associate member. School of Graduate Studies, University of Toronto, Toronto;
2. Department of Speech Pathology and Audiology, Western Virginia University and has a joint appointment in the Department of Otolaryngology—Head and Neck Surgery, the West Virginia University Health Science Center;
3. Department of Communication Disorders, Louisiana State University Medical Center (Shreveport).
4. Boston University
5. Department of Speech Pathology and Audiology at West Virginia University at the time of this study.