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- Acquired Immunodeficiency Syndrome -- prevention & control967
- Condoms431
- Safe Sex413
- Nurses340
- Anniversaries and Special Events290
- Acquired Immunodeficiency Syndrome268
- Physicians219
- Health Promotion200
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- National Library of Medicine (U.S.)162
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- United States129
- HIV Infections -- prevention & control127
- Substance-Related Disorders -- prevention & control127
- Fredrickson, Donald S.122