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In 1864, the first barbiturate (barbituric acid) was synthesized.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.