@article{ref1,
title="Dangerous form of marijuana",
journal="Annals of emergency medicine",
year="1999",
author="Nelson, Lewis S. and nd, JA and Ravikumar, P. R.",
volume="34",
number="1",
pages="115-116",
abstract="Abstract unavailable.",
language="",
issn="0196-0644",
doi="",
url="http://dx.doi.org/"
}