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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
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Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).
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The horizontal fraction bar was introduced by the Arabs.