The NCBI will be performing maintenance on the NLM data center on Friday, July 25, starting at 8PM CT. The downtime is expected to last 24 hours or more, and during this time you may experience interrupted access or degraded performance across a range of NLM resources, including PubMed, MedlinePlus, ClinicalTrials.gov and other search tools, submission systems, and programmatic services.
Learn more about the scheduled downtime.
If you are unable to connect to PubMed during the downtime, here are some other resources:
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