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

CDC Centers for Disease Control and Prevention - Your Online Source for Credible Health Information

Read doctor-produced health and medical information written for you to make informed decisions about your health concerns.

The National Library of Medicine (NLM), on the campus of NIH in Bethesda, Maryland, is the world

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 literat...

The leading source for trustworthy and timely health and medical news and information. Providing credible health information, supportive community, and educational services by blending award-winning expertise in content, community services, expert co...

Pet Health Information - PetMD is the largest website library of pet health information, including symptoms, diagnosis and treatment, with thousands of veterinarian written and approved articles.

Lab Tests Online offers noncommercial patient education on blood, urine, and other lab tests to help health care consumers better manage their care.

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Comprehensive, up-to-date information on HIV and AIDS treatment, prevention, and policy from the University of California San Francisco.