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Vision, hearing, balance, and sensory impairment in Americans aged 70 years and over: United States, 1999-2006.

Dillon CF, Gu Q, Hoffman HJ, Ko CW. Vision, hearing, balance, and sensory impairment in Americans aged 70 years and over: United States, 1999-2006. NCHS Data Brief. 2010 Apr; (31):1-8.

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