Generally, we do not recommend that you export references directly from a database into Covidence. Citation managers such as F1000 and Endnote have much more powerful deduplication features, so putting your citations in a reference manager first will ensure that you don't import duplicates into Covidence. But if you do need to export references directly from PubMed into Covidence for some reason, the instructions on this page will show you how.
Run your search exactly as you want it. Do not select any articles. Under the “Send to” menu, select File.
You will then see options for what type of file to create. Select XML format and then create the file. Note that the total number of results (XXX for this search) will be downloaded.
If Pubmed creates a file on your computer, you can import it into Covidence. If you get a webpage that looks like the image above, right click the page and select “Save As.”
This will save the file to your computer, and then you can import it into Covidence.