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Approximately 500,000 babies are born each year in the United States to teenage mothers.

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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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Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

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In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

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There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

A toddler's developing motor skills allow the child to exert more independence and control over A toddler's developing motor skills allow the child to exert more independence and control over
Negative feedback control of a regulated variable. Negative feedback control of a regulated variable.
With a three-way catalytic converter, emission control is most efficient with an air–fuel ratio ... With a three-way catalytic converter, emission control is most efficient with an air–fuel ratio ...
Control of the anterior and posterior pituitary by the hypothalamus. Control of the anterior and posterior pituitary by the hypothalamus.
Control points in pyrimidine synthesis Control points in pyrimidine synthesis
Regions involved in the control of genetic expression of the lac operon Regions involved in the control of genetic expression of the lac operon
Video: The Pressure Flow Model in a Plant

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