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- Ultrasonic Therapy -- adverse effects1
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- United States[remove]100
- United States.10
- United States. Administration on Aging.1
- United States. Department of Health and Human Services.1
- United States. Department of Housing and Urban Development.1
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- United States. Environmental Protection Agency.1
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- United States. Social Security Administration.1
- Universal Coverage -- economics1
- Universal Coverage -- legislation & jurisprudence1
- Universal Coverage -- statistics & numerical data1