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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.
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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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Medication errors are more common among seriously ill patients than with those with minor conditions.
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There are 20 feet of blood vessels in each square inch of human skin.