“Europe PubMed Central (Europe PMC) offers free access to biomedical literature resources including:
- PubMed abstracts (about 22 million)
- Europe PMC full text articles (about 2.2 million, of which over 400,000 are Open Access)
- Patent abstracts (over 4 million European, US, and International)
- National Health Service (NHS) clinical guidelines
Agricola records (500,000)
- Supplemented with Chinese Biological Abstracts and the Citeseer database.