1. Department of Communication Disorders; Brigham Young University; Provo Utah U.S.A.
2. the Department of Physics and Astronomy; Brigham Young University; Provo Utah U.S.A.
3. Department of Communication Sciences and Disorders; University of Utah; Salt Lake City Utah U.S.A.
4. Department of Physiology and Developmental Biology; Brigham Young University; Provo Utah U.S.A.
5. Department of Communicative Sciences and Disorders; Michigan State University; East Lansing Michigan U.S.A.
6. Division of Otolaryngology, Head and Neck Surgery; The University of Utah School of Medicine; Salt Lake City Utah U.S.A.