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More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
There are 20 feet of blood vessels in each square inch of human skin.
Vaccines prevent between 2.5 and 4 million deaths every year.
More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
The familiar sounds of your heart are made by the heart's valves as they open and close.
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