| http://www.w3.org/ns/prov#value | - tion center, said in a statement.Drug shortages have long been a problem for federal officials, and can be caused by manufacturing outages, delays and other problems.According to the FDA, the number of drug and medical product shortages quadrupled from 2005 to 2011, when there were more than 250 cases.That number ticked down to 117 in 2012, after President Obama signed an executive order telling t
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