1. National Health and Nutrition Examination Survey: Plan and Operations, 1999–2010. Centers for Disease Control and Prevention (CDC), National Center for Health Statistics (NCHS). Available from: http://www.cdc.gov/nchs/data/series/sr_01/sr01_056.pdf . Accessed May 20, 2016.
2. National Institutes on Deafness and Other Communication Disorders. NIDCD Workshop on Epidemiology of Communication Disorders. 2005. Available from: http://www.nidcd.nih.gov/funding/programs/pages/episummary.aspx . Accessed May 20, 2016.
3. Healthy People 2020 Topics & Objectives: Hearing and Other Sensory or Communication Disorders. U.S. Department of Health and Human Services, Office of Disease Prevention and Health Promotion. Available from: http://www.healthypeople.gov/2020/topicsobjectives2020/objectiveslist.aspx?topicId=20 . Accessed May 20, 2016.
4. National Health and Nutrition Examination Survey (NHANES) Taste and Smell Examination Component Manual. CDC, NCHS. Available from: http://www.cdc.gov/nchs/data/nhanes/nhanes_13_14/Taste_Smell.pdf . Accessed May 20, 2016.
5. NIH Toolbox For the Assessment of Neurological and Behavioral Function. NIH Blueprint for Neuroscience Research. Available from: http://www.nihtoolbox.org/WhatAndWhy/Sensation . Accessed May 20, 2016.