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Subjects
- Ulcer2
- Ulcer -- therapy1
- Unemployment1
- United Kingdom23
- United Society for Visiting and Relieving the Sick (London, England)1
- United States20
- United States -- epidemiology1
- University of Cambridge.1
- University of Edinburgh. Faculty of Medicine.1
- University of Oxford.1
- Urethral Stricture1
- Urinary Bladder Calculi -- etiology1
- Urinary Bladder Calculi -- therapy1
- Urinary Bladder Neck Obstruction1
- Urinary Catheterization1
- Urine1
- Urticaria1
- Uterine Hemorrhage1
- Uterus -- anatomy & histology1