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Subjects
- Uncompensated Care2
- United Kingdom3
- United States68
- United States.1
- United States. Agency for Healthcare Research and Quality.1
- United States. Department of Health and Human Services2
- United States. Department of Health and Human Services.3
- United States. Dept. of the Treasury1
- United States. Public Health Service.9
- Universities1
- University of Maryland (1812-1920). University Hospital.1
- University of Pennsylvania. Department of Medicine.1
- Urban Population1
- Uruguay1