PubMed's Outside Tool allows libraries to place a link to their link resolver on every PubMed record.
PALS has written detailed instructions on how to set this up with PALSconnect Linker, which you'll find on the MnPALS Wiki:
Link PALSconnect Linker in PubMed
PALS provides a template for the e-mail you'll need to send PubMed to get things started. There are also instructions for configuring Linker and EZproxy once PubMed has activated your account.
PubMed replied to our e-mail one week later with our Outside Tool URL and other account information, including our Library Submission Utility username and password. The Library Submission Utility allows you to make minor changes to the Outside Tool and to view usage statistics.
We now use the following URL for PubMed, where we once used pubmed.gov:
1300 145th Street E.
Rosemount, MN 55068