1. Department of Otolaryngology-Head and Neck Surgery, Northwestern Medicine, Chicago, IL, USA
2. Department of Otolaryngology-Head and Neck Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
3. Interacoustics A/S, Assens, Denmark
4. Interacoustics US, Eden Prairie, MN, USA
5. Hugh Knowles Hearing Centre, Evanston, IL, USA
6. Department of Otolaryngology-Head and Neck Surgery, University of California San Diego, San Diego, CA, USA