A Note of Caution: Preprint articles, or "Epub ahead of print," should always be considered works in progress as they may not be peer reviewed or entirely reliable on their own as either scientific evidence, public policy or the basis of treatment. In some cases, retractions may not appear in PubMed or other sites for several days or weeks.
Follow Retraction Watch at https://retractionwatch.com/retracted-coronavirus-covid-19-papers/ for notices about retraction or ask your hospital librarian to check for you if you have concerns about the reliability of any recently published literature.
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