A team of Web-publishing professionals and medical experts work side by side to produce this site. Through this unique collaboration, we give you access to the experience and knowledge of the more than 2,000 physicians and scientists of Mayo Clinic.

MerckSource offers a wide variety of core health tools and resources, available to you 24 hours a day, 7 days a week. We've designed this website with your health and medical needs in mind. Best of all, it's free and it has absolutely no advertising. No distractions. Just credible, unbiased health and medical information at your fingertips.

A free online dictionary of medical related terminology as well as an online discount pharmacy store.

An online medical dictionary is the medical reference for MedicineNet.com, containing easy-to-understand explanations of over 15,000 medical terms. This online medical dictionary provides quick access to hard-to-spell medical definitions through an extensive alphabetical listing.

Stedman's Medical Dictionaries, Word Books, Spellcheckers, and Other Resources - medicine's most authoritative word references.

Full-text searching and hyperlinks to cross-references, illustrations, audio pronunciations, and tables.

The National Library of Medicine (NLM) published its first Web site (www.nlm.nih.gov) in October of 1993 and was one of the first U.S. federal Web sites. In 1999 the site's use was 6 million page hits and 380,000 unique visitors and has grown in 2003 to over 37 million page hits and 4 million unique visitors. The Web has become such an integral part of NLM's services that of the over 100,000 customer services requests made to NLM in 2003, over 50,000 of those arrived via email or a web-based form.

The Harvard medical school family health guide. After choosing a type of test, information will come up in easy to access sections.