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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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