@article{ref1,
title="Urinary excretion of coproporphyrin in alcoholics. Studies on "single-voiding" samples",
journal="Quarterly journal of studies on alcohol",
year="1972",
author="Shrivastava, K. C. and Orten, J. M.",
volume="33",
number="4",
pages="962-965",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0033-5649",
doi="",
url="http://dx.doi.org/"
}