ClinicalTrials.gov - a registry and results database of federally and privately supported clinical trials
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DOAJ - Directory of Open Access Journals
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HighWire Stanford University - A division of Stanford University Libraries
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PLoS - Public Library of Science: an "open-access" publisher of scientific and medical research.
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PubMed Central - PMC is a free full-text archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health's National Library of Medicine (NIH/NLM).
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RACGP - Royal Australian College of General Practitioners
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| Google Scholar |
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