On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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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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Blood is approximately twice as thick as water because of the cells and other components found in it.
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As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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Which of the following statements is true of linkage?