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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.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
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The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.