@article{ref1,
title="A survey of alcohol and drug use in medical students",
journal="Diseases of the nervous system",
year="1977",
author="Thomas, R. B. and Luber, S. A. and Smith, J. A.",
volume="38",
number="1",
pages="41-43",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0012-3714",
doi="",
url="http://dx.doi.org/"
}