@article{ref1,
title="Relationship between nonmedical prescription-opioid use and heroin use",
journal="New England journal of medicine",
year="2016",
author="Compton, Wilson M. and Jones, Christopher M. and Baldwin, Grant T.",
volume="374",
number="2",
pages="154-163",
abstract="A large fraction of heroin users now report that they formerly used prescription opioids nonmedically, a finding that has led to restrictions on opioid prescribing. Nevertheless, only a small fraction of prescription-opioid users move on to heroin use.<p /><p>Language: en</p>",
language="en",
issn="0028-4793",
doi="10.1056/NEJMra1508490",
url="http://dx.doi.org/10.1056/NEJMra1508490"
}