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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
Medication errors are more common among seriously ill patients than with those with minor conditions.
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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