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Subjects
- Ulcer -- therapy2
- United Kingdom2
- United States35
- United States Naval Observatory.1
- United States. Navy Department. Medical Service Corps.1
- United States. War Department.1
- Universities -- organization & administration1
- University of Pennsylvania.1
- Urban Health1
- Urea1
- Urethral Diseases3
- Urethral Stricture2
- Urethral Stricture -- surgery1
- Urethral Stricture -- therapy1
- Urinalysis3
- Urinary Bladder Calculi -- surgery1
- Urinary Bladder Diseases1
- Urinary Calculi1
- Urinary Calculi -- veterinary1
- Urinary Catheterization1