| http://www.w3.org/ns/prov#value | - It is our hope that the responses discussed here will inform the creation of useful response categories for future research.There is ample evidence that the nonmedical use of pain medications is on the rise in the U.S. and this increase coincides with the increase in retail sales and prescriptions dispensed for opioid medications such as fentanyl, oxycodone, hydrocodone, hydromorphone, and morphin
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