Mayo Clinic offers award-winning medical and health information and tools for healthy living.

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.

Access information about von Willebrand Disease (VWD), hemophilia, and rare bleeding disorders. Symptoms, resources, and tools to help patients and HCPs manage living with a bleeding disorder.

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. Hous

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

Information on dog, cat, and other pet health, behavior, nutrition, training and animal care tips provided by veterinarians.