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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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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.
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The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.