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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.
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There are approximately 3 million unintended pregnancies in the United States each year.
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The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.