1. Harvard Medical School Boston Massachusetts USA
2. Division of Otolaryngology–Head and Neck Surgery, Beth Israel Deaconess Medical Center Harvard Medical School Boston Massachusetts USA
3. Division of Otology, Neurotology, and Lateral Skull Base Surgery, Department of Otolaryngology–Head and Neck Surgery Hospital of the University of Pennsylvania Philadelphia Pennsylvania USA
4. Massachusetts Eye and Ear Infirmary Harvard Medical School Boston Massachusetts USA
5. Biotech Commons, Johnson Pavilion University of Pennsylvania Philadelphia Pennsylvania USA
6. Department of Otolaryngology–Head and Neck Surgery The Ohio State University Wexner Medical Center Columbus Ohio USA
7. Department of Otolaryngology–Head and Neck Surgery Vanderbilt University Medical Center Nashville Tennessee USA