When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.
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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
Structures of the endocrine system.
TEN RULES OF PERFORMANCE IN A REDESIGNED HEALTH CARE SYSTEM