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For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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Medication errors are more common among seriously ill patients than with those with minor conditions.