1. Epidemiology and Statistics Program, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, Maryland
2. Department of Otolaryngology–Head and Neck Surgery, The University of Texas Health Science Center at San Antonio3Department of Otolaryngology–Head and Neck Surgery, The University of California at Davis4Dobie Associates, San Antonio, Texas
3. Hearing Loss Prevention Team, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Cincinnati, Ohio
4. Department of Speech Pathology and Audiology, Western Michigan University, Kalamazoo7Stephenson & Stephenson Research & Consulting, Loveland, Ohio