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Subjects
- Ultrasonic Therapy -- adverse effects1
- Uncertainty1
- Uncompensated Care12
- Uncompensated Care -- economics6
- Uncompensated Care -- history1
- Uncompensated Care -- legislation & jurisprudence1
- Uncompensated Care -- statistics & numerical data5
- Uncompensated Care -- trends1
- Underage Drinking -- statistics & numerical data1
- Undocumented Immigrants7
- Undocumented Immigrants -- legislation & jurisprudence2
- Undocumented Immigrants -- statistics & numerical data1
- Unemployment22
- Unemployment -- statistics & numerical data14
- Unemployment -- trends3
- United Kingdom54
- United States3,671
- United States -- epidemiology2
- United States Virgin Islands8
- United States.573