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Subjects
- U.S. Nuclear Regulatory Commission.1
- Ultrasonic Surgical Procedures -- adverse effects1
- Ultrasonic Surgical Procedures -- instrumentation1
- Ultrasonic Surgical Procedures -- standards1
- Ultrasonic Therapy -- adverse effects1
- Ultrasonography -- instrumentation1
- Uncertainty2
- Uncompensated Care13
- Uncompensated Care -- economics7
- Uncompensated Care -- history1
- Uncompensated Care -- legislation & jurisprudence1
- Uncompensated Care -- statistics & numerical data5
- Uncompensated Care -- trends1
- Underage Drinking -- statistics & numerical data1
- Undocumented Immigrants9
- Undocumented Immigrants -- legislation & jurisprudence4
- Undocumented Immigrants -- statistics & numerical data2
- Unemployment22
- Unemployment -- statistics & numerical data16
- Unemployment -- trends4