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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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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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The horizontal fraction bar was introduced by the Arabs.

