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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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Asthma cases in Americans are about 75% higher today than they were in 1980.