1. Communication Sciences and Disorders, University of Central Arkansas, Conway, Arkansas 72035, USA
2. Sonova China, 757 Mengzi Road, Huangpu District, Shanghai 200233, China
3. Department of Otolaryngology, Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing 100005, China
4. Sonova AG, Laubisruetistrasse 28, 8712 Staefa, Switzerland
5. Communication Sciences and Disorders, Ohio University, Athens, Ohio 45701, USA