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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
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Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.