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Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

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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.

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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

The role of the liver in fuel supply to the blood. The role of the liver in fuel supply to the blood.
Female individuals of the banded Uromastyx, Uromastyx flavofasciata, are different colours. Most nat Female individuals of the banded Uromastyx, Uromastyx flavofasciata, are different colours. Most nat
The Role of Microfilaments in Cell Movement-Showing Cause and Effect in Biology 2 The Role of Microfilaments in Cell Movement-Showing Cause and Effect in Biology 2
Vertebral compression Fractures of the spine (vertebra) can cause severe ”band-like” pain that radia Vertebral compression Fractures of the spine (vertebra) can cause severe ”band-like” pain that radia
In pretend play, toy figures and animals “come to life” and interact with each other. In pretend play, toy figures and animals “come to life” and interact with each other.
Associate’s degrees or vocational degrees can help individuals find rewarding and productive ... Associate’s degrees or vocational degrees can help individuals find rewarding and productive ...
Video: Male Reproductive System - The gonadotropin releasing hormone

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