1. Keck School of Medicine University of Southern California Los Angeles California U.S.A.
2. Department of Otolaryngology‐Head and Neck Surgery University of South Florida Tampa Florida U.S.A.
3. UCSF Voice and Swallowing Center, Department of Otolaryngology‐Head and Neck Surgery University of California San Francisco California U.S.A.
4. Department of Otolaryngology – Head and Neck Surgery, Keck School of Medicine University of Southern California Los Angeles California U.S.A.