@article{ref1,
title="Twelve-year follow-up of New York narcotic addicts. II. The natural history of a chronic disease",
journal="New England journal of medicine",
year="1966",
author="Vaillant, G. E.",
volume="275",
number="23",
pages="1282-1288",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0028-4793",
doi="10.1056/NEJM196612082752305",
url="http://dx.doi.org/10.1056/NEJM196612082752305"
}