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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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More than 4.4billion prescriptions were dispensed within the United States in 2016.

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

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