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

ZocDoc enables you to make appointments for free with dentists and doctors instantly online. Find doctors or dentists who accept your insurance and have appointments at a time of your choice. Read reviews by real patients.

Trusted medical information to encourage healthy living. Enjoy free health tools and view detailed doctor-reviewed information about diseases, medical symptoms, treatments, drugs, and nutrition.

Lung cancer is the leading cause of cancer deaths worldwide. Despite being so common, navigating the health care system from lung cancer diagnosis to lung cancer treatment can be a lonely and frightening time. In this About.com health guide we

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

Answer your questions about fitness, health, nutrition and sports on Chron.com.

Award-winning, trustworthy, and credible health information and tools for patients from American Academy of Family Physicians.

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