About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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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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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.
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More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
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The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.
Distribution of the Old World monkeys.
The Land Ordinance of 1785 called for surveying and dividing the Western Territories into square mil
Distribution and Forms of Precipitation: Graupel and Hail
Global Distribution of Precipitation
Distribution of Modern Day Oceanic Plateaus and Fragments