PubMed comprises more than 22 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites.
Survey data from over 10,000 US and 8,000 international studies. Search tools designed specifically for survey questions–best finding aid for US survey data and one-stop shopping for all major US commercial, media, and academic polls.