@article{ref1,
title="The 2D:4D digit ratio: a biomarker of alcohol and drug abuse?",
journal="Current drug abuse reviews",
year="2011",
author="Verster, Joris Cornelis and de Haan, Lydia",
volume="4",
number="2",
pages="65-66",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1874-4737",
doi="",
url="http://dx.doi.org/"
}