The role of the state in hearing health care.
D003638:Deafness / Q000266:history*; D006233:Persons with Disabilities; D006296:Health Services / Q000266:history / Q000331:legislation & jurisprudence; D006317:Hearing Loss, Noise-Induced / Q000191:economics; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009313:National Health Programs / Q000266:history*; D011632:Public Assistance / Q000331:legislation & jurisprudence; D006113:United Kingdom