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Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Asthma cases in Americans are about 75% higher today than they were in 1980.
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
On average, the stomach produces 2 L of hydrochloric acid per day.
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