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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

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Medication errors are three times higher among children and infants than with adults.

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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Graphic display of hypothetical results of a predator removal experiment. Graphic display of hypothetical results of a predator removal experiment.
Why are some of the letters above the red line and some letters below? Why are some of the letters above the red line and some letters below?
Operation of a typical pulse generator (pickup coil). At the bottom is a line drawing of a typical ... Operation of a typical pulse generator (pickup coil). At the bottom is a line drawing of a typical ...
A Possible Problem with the Anger and Concentration Experiment A Possible Problem with the Anger and Concentration Experiment
Nuchal Line Nuchal Line
Excel hardware is introducing a new product on a new product line of capacity 800 units per ... Excel hardware is introducing a new product on a new product line of capacity 800 units per ...
Video: Digestion Animation

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