Evidence is not always available via filtered resources. Searching the primary literature may be required. It is possible to use specific search strategies in MEDLINE and other databases to achieve the highest possible level of evidence.
PubMed/MEDLINE is the pre-eminent biomedical database in the world, covering the fields of medicine, nursing, dentistry, pharmacy/pharmacology, the health care system, and the preclinical sciences. The PubMed/MEDLINE database is compromised of bibliographic citations and abstracts from more than 4,900 biomedical journals, containing more than 17 million citations dating back to the mid-1800s.
