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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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The horizontal fraction bar was introduced by the Arabs.
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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.
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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.