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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
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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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People about to have surgery must tell their health care providers about all supplements they take.
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There are more nerve cells in one human brain than there are stars in the Milky Way.