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Subjects
- United States21
- United States. Army. Medical Department.1
- United States. Pension Bureau.1
- Universidad de El Salvador. Facultad de Farmacia y Ciencias Naturales.1
- Universities1
- Universities -- standards1
- University of Pennsylvania. Hospital.1
- Unnecessary Procedures1
- Urban Population1
- Ureter -- abnormalities1
- Ureter -- surgery1
- Ureteroscopes1
- Urethra -- surgery1
- Urethral Diseases -- diagnosis1
- Urethral Diseases -- therapy1
- Urethral Stricture1
- Urethral Stricture -- surgery3
- Urinalysis2
- Urinary Bladder -- surgery1
- Urinary Bladder Calculi -- surgery1