@article{ref1,
title="The glass ceiling on evidence of cannabis related harms – flawed or just false?",
journal="Addiction",
year="2011",
author="Copeland, Jan",
volume="106",
number="2",
pages="249-251",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0965-2140",
doi="10.1111/j.1360-0443.2010.03273.x",
url="http://dx.doi.org/10.1111/j.1360-0443.2010.03273.x"
}