Check out this video that introduces how to use boolean operators in PubMed. From the Florida State University College of Medicine
If you'd like the inside scoop on how to use PubMed and its features, click HERE to go to the PubMed Online Training page. You can watch short videos (2-3 minutes) on single topics, such as doing a basic search, or choose more advanced, in-depth tutorials and learn about topics such as MeSH or searching for drugs.