@article{doi:10.1001/jama.2011.1961,
author = {Pletcher MJ and Vittinghoff E and Kalhan R and et al},
title = {ASsociation between marijuana exposure and pulmonary function over 20 years},
journal = {JAMA},
volume = {307},
number = {2},
pages = {173-181},
year = {2012},
doi = {10.1001/jama.2011.1961},
URL = { + http://dx.doi.org/10.1001/jama.2011.1961},
eprint = {/data/Journals/JAMA/22485/joc15154_173_181.pdf}
}