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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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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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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
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Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.