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Subjects
- Ulna -- surgery1
- Umbilical Cord -- surgery1
- Umbilicus1
- Unconsciousness -- etiology1
- United Kingdom1
- United States35
- United States. Army Medical School.1
- United States. Army. Medical Department1
- United States. Army. Medical Department.1
- Universities3
- Universities -- history1
- Unnecessary Procedures1
- Urbanization1
- Ureter -- surgery1
- Ureteral Diseases1
- Ureteral Obstruction -- surgery1
- Ureteroscopy -- methods1
- Urethral Diseases -- surgery1
- Urethral Diseases -- therapy1
- Urethral Neoplasms1