1. UAB Voice Center, Department of Otolaryngology‐Head and Neck Surgery University of Alabama Birmingham Alabama U.S.A.
2. School of Kinesiology Auburn University Auburn Alabama U.S.A.
3. USC Voice Center, Department of Otolaryngology‐Head and Neck Surgery University of Southern California Los Angeles California U.S.A.
4. Department of Communication Disorders California State University Los Angeles Los Angeles California U.S.A.