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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.