@article{ref1,
title="Commentary on Harper S, Strumpf EC, Kaufman JS. Do medical marijuana laws increase marijuana use? Replication study and extension",
journal="Annals of epidemiology",
year="2012",
author="Wall, Melanie M. and Poh, Ernest and Cerdá, Magdalena and Keyes, Katherine M. and Galea, Sandro and Hasin, Deborah S.",
volume="22",
number="7",
pages="536-537",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1047-2797",
doi="10.1016/j.annepidem.2012.03.003",
url="http://dx.doi.org/10.1016/j.annepidem.2012.03.003"
}