External links search

Wildcards such as "*.wikipedia.org" may be used.
Supported protocols: bitcoin:, ftp://, ftps://, geo:, git://, gopher://, http://, https://, irc://, ircs://, magnet:, mailto:, matrix:, mms://, news:, nntp://, redis://, sftp://, sip:, sips:, sms:, ssh://, svn://, tel:, telnet://, urn:, worldwind://, xmpp: (defaults to http:// if no protocol is specified).

Showing below up to 2 results in range #1 to #2.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3457925/ is linked from DeltaCC12
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3457925/ is linked from CC1/2