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Entrez Simultaneously search multiple life sciences databases at the National Center for Biotechnology Information (NCBI). http://www.ncbi.nlm.nih.gov/gquery/gquery.fcgi
Gateway The National Library of Medicine Gateway allows users to search in multiple retrieval systems at the U.S. National Library of Medicine. http://gateway.nlm.nih.gov/
Healia Personalized consumer health search engine. Using specialized algorithms, it attempts to evaluate the quality of health-related content found on web pages. http://www.healia.com/
Healthline Search engine focused on consumer health care and medical information. http://www.healthline.com/
KMLE Medical Dictionary Search several resources simultaneously for medical terminology, medical abbreviations, journals, and drug names. http://www.kmle.com/
Med Help International Search Consumer medical search engine comprising articles, patient support groups, glossary, and questions and answers. http://www.medhelp.org/search.htm
MedHunt A tool from Health on the Net that searches the full text of 60,000 medical documents. Searches can be narrowed by location or type of source. http://www.hon.ch/MedHunt/
Medical World Search This tool has the ability to query other search engines, also provides a discussion forum, medical spelling and drug acronym devices. All users must register and pay annual membership fee. http://www.mwsearch.com/
Medic8.com Directory and medical search engine for healthcare professionals. http://www.medic8.com/
Medstory Find a search for health and medical information. http://www.medstory.com/
SearchMedica Search engine for medical professionals focusing on clinical research, Medline, evidence-based medicine and other professional medical content. http://www.searchmedica.com
U.S. Non-Commercial Medical Search Engines Dr. Claudia Krenz provides search boxes and instructions for specialist search tools, mainly maintained by the National Library of Medicine. http://www.claudiax.net/US_medsearch.html
Vivísimo ClusterMed Sends requests to the PubMed search engine and clusters the search results. http://clustermed.info/
Worldhealthcare.net A UK based medical search engine providing informative resources from around the globe. http://www.worldhealthcare.net/
