MEDLINE*

http://www.nlm.nih.gov/
Complied and maintained by the US National Library of Medicine, it contains references and abstracts from more than 4,600 health care journals from 1966 to present.

Pub Med

http://www.pubmedcentral.nih.gov/
A free and unrestricted archive of health sciences literature.

CINAHL*

http://www.cinahl.com/
Maintained by EBSCO publishing, this database contains more than 500,000 records from nursing and 17 allied health disciplines from 1982 to present.

EMBASE*

Available through database services such as OVID

European medical database contains journals that are not listed on MEDLINE in both English and European Languages, from 1988 on.

Joanna Briggs Institute

http://www.joannabriggs.edu.au/about/home
Nursing website, maintained by the Australian Government with international collaborating centers, designed to improve the effectiveness of nursing practice and heath care outcomes by conducting systematic reviews, analyses of the research literature and dissemination of results.

ACP Journal Club*

http://www.acpjc.org
Published by the American College of Physicians and edited from McMaster University, this database provides brief reviews of randomized clinical trials in all areas of medicine.

Health and Psychosocial Instruments*

Available only through database services such as OVID

Complied and maintained by Behavioral Medicine Database Services, this database brings together citations that identify and evaluate instruments used in health and psychosocial research studies.

Patient Oriented Evidence that Matters (POEM)*

http://www.infopoems.com/
Compiled by an editorial board and maintained by a private corporation, two database services are offered, InfoRetriever combines results from several evidenced-based databases to provide information about current best evidence, and Daily POEMS is an email service that provides synopses of research evidence Monday to Friday.

Campbell Collaboration*

http://www.campbellcollaboration.org/
Nonprofit organization that aims to help clinicians and others make well-informed decisions about effects of interventions in social, behavioral, and educational arenas.

National Guidelines Clearinghouse

http://www.guideline.gov/
Sponsored by the Agency for Healthcare Research and Quality. Source of evidence-based clinical practice guidelines and multiple quality assessment tools.

Agency for Healthcare Research and Quality

http://www.ahcpr.gov/clinic/epcix.htm
Nation's leading Federal agency for research on health care quality, costs, outcomes, and patient safety.

* Site requires registration or a subscription through OVID or a similar service.