@article{ref1,
title="Risk of suicide in twins: intelligence of twins and singletons may explain risk",
journal="BMJ",
year="2003",
author="Voracek, Martin",
volume="327",
number="7424",
pages="1168; author reply 1169-1168; author reply 1169",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-535X",
doi="10.1136/bmj.327.7424.1168-a",
url="http://dx.doi.org/10.1136/bmj.327.7424.1168-a"
}