@article{ref1,
title="National Highway Traffic Safety Administration (NHTSA) notes. Marijuana and alcohol combined severely impede driving performance",
journal="Annals of emergency medicine",
year="2000",
author="",
volume="35",
number="4",
pages="398-399",
abstract="<p>[Abstract unavailable]   Keywords: Cannabis impaired driving; DUID; Ethanol impaired driving</p> <p>Language: en</p>",
language="en",
issn="0196-0644",
doi="10.1016/S0196-0644(00)70061-8",
url="http://dx.doi.org/10.1016/S0196-0644(00)70061-8"
}