To search for past articles, click on the link to get to the PubMed query screen. Place a space after the first directive and add a Boolean operator in all caps (AND, NOT, OR) followed by another search term.
To search IRB for citations containing the phrase Levine, the query would be structured as follows:
"IRB"[Journal:__jrid25663] AND Levine
PubMed searches will not produce full articles, but will give citations. For further assistance please contact either PubMed or the National Library of Medicine. A link to the tutorial section of the PubMed website is below.
PubMed Tutorial: http://www.nlm.nih.gov/bsd/pubmed_tutorial/m1001.html