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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.