@article{ref1,
title="Estimating harmful effects of cannabis and use for policy makers shifting from one mistake to the next?",
journal="Addiction",
year="2010",
author="Wittchen, HANS‐ULRICH",
volume="105",
number="8",
pages="1334-1335",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0965-2140",
doi="10.1111/j.1360-0443.2010.02937.x",
url="http://dx.doi.org/10.1111/j.1360-0443.2010.02937.x"
}