- African Index Medicus Database
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- Directory of Open Access Journals (DOAJ)
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- FreeBooks4Doctors
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- Glossary of HIV / AIDS-related Terms
- HighWire Press Stanford University
- IMEMR database (The Index Medicus for the Eastern Mediterranean Region)
- Digital Library, Maharashtra University of Health Sciences, Nashik
- NLM Gateway
- OMICS International
- POPLINE (Population information online)
- PubMed
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- Science.gov
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