?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Harker%2C+JA&rft.aufirst=JA&rft.aulast=Harker&rft.volume=160&rft.issue=2&rft.date=June+2020&rft.pages=103-105&rft.atitle=Immunological+fortification+at+our+barrier+organs%3A+Protecting+us+as+we+age&rft.title=Immunology&rft.genre=article