Asthma cases in Americans are about 75% higher today than they were in 1980.
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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.
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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
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There are 20 feet of blood vessels in each square inch of human skin.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.