The eMedicine point-of-care clinical reference features up-to-date, searchable, peer-reviewed medical articles organized in specialty-focused textbooks, and is continuously updated with practice-changing evidence culled daily from the medical literature.

The National Library of Medicine (NLM), on the campus of NIH in Bethesda, Maryland, is the world's largest medical library. It collects materials in all major areas of the health sciences and to a lesser degree in such areas as chemistry, physics, botany and zoology. The collections stand at 5 million items--books, journals, technical reports, manuscripts, microfilms, photographs and images. Housed within the Library is one of the world's finest medical history collections of old (pre-1914) and rare medical texts, manuscripts, and incunabula.

HealthCentral.com is one of the most trusted sources of medical information and up to date news and contains a doctor-approved health encyclopedia of diseases and conditions, the ability to find symptoms and treatments. Also drug information with side effects and interactions

Homepage of Merck.com, Merck's corporate Web site

Mayo Clinic — Comprehensive medical diagnosis and treatment; locations and services; request an appointment.