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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.