PubMed - Official Site PubMed comprises more than 28 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
PubMed PubMed® comprises more than 40 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
PMC Home PubMed Central ® (PMC) is a free full-text archive of biomedical and life sciences journal literature at the U S National Institutes of Health's National Library of Medicine (NIH NLM)
About - PubMed PubMed is a free resource supporting the search and retrieval of biomedical and life sciences literature with the aim of improving health–both globally and personally
PubMed | library - Zhejiang University PubMed是由美国国立医学图书馆（U S National Library of Medicine）国家生物技术信息中心开发研制的基于Web的网上医学文献检索系统。 该系统具有强大的检索和链接功能，是目前世界上查找医学文献利用率最高的网上免费数据库。
PubMed - Wikipedia PubMed is an openly accessible, free database which primarily includes the MEDLINE database of references and abstracts on life sciences and biomedical topics The United States National Library of Medicine (NLM) at the National Institutes of Health maintains the database as part of the Entrez system of information retrieval