title: Augmentative and alternative communication.
authors.forename: C M
authors.initials: CM
authors.lastname: Shewan
authors.forename: A
authors.initials: A
authors.lastname: Blake
mesh_terms: D003143:Communication Devices for People with Disabilities / Q000706:statistics & numerical data*; D003147:Communication Disorders / Q000453:epidemiology / Q000534:rehabilitation*; D004651:Employment / Q000706:statistics & numerical data; D006801:Humans; D015995:Prevalence; D013066:Speech-Language Pathology / Q000379:methods* / Q000706:statistics & numerical data; D014481:United States