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Subjects
- U.S. Marine Hospital, San Francisco.1
- UNICEF.1
- USSR71
- Uganda7
- Ukraine3
- Ulcer1
- Ultraviolet Rays -- adverse effects3
- Ultraviolet Therapy1
- Umbilical Cord -- surgery1
- Underage Drinking -- prevention & control5
- Underhill, Lilian A., 1885-1977.1
- Unemployment2
- Union Pacific Railroad Company.2
- Unione infermiere San Camillo.3
- United Arab Emirates1
- United Kingdom97
- United Kingdom -- epidemiology2
- United Nations.2
- United States352
- United States -- epidemiology1