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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

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Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Signs and symptoms of chronic liver failure. Signs and symptoms of chronic liver failure.
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Selected Minerals: Food Sources, Functions, and Deficiency and Toxicity Symptoms (continued) Selected Minerals: Food Sources, Functions, and Deficiency and Toxicity Symptoms (continued)
Chronic lymphedema. Chronic lymphedema.
Enzymatic abnormalities in three types of gout Enzymatic abnormalities in three types of gout
The genetic ratios resulting from crossing two heterozygotes The genetic ratios resulting from crossing two heterozygotes
Video: Fermentation pathways

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