@article{de_Graaf_2010,
title={Early Cannabis Use and Estimated Risk of Later Onset of Depression Spells: Epidemiologic Evidence From the Population-based World Health Organization World Mental Health Survey Initiative},
volume={172},
ISSN={1476-6256},
url={http://dx.doi.org/10.1093/aje/kwq096},
DOI={10.1093/aje/kwq096},
number={2},
journal={American Journal of Epidemiology},
publisher={Oxford University Press (OUP)},
author={de Graaf,
R. and Radovanovic,
M. and van Laar,
M. and Fairman,
B. and Degenhardt,
L. and Aguilar-Gaxiola,
S. and Bruffaerts,
R. and de Girolamo,
G. and Fayyad,
J. and Gureje,
O. and Haro,
J. M. and Huang,
Y. and Kostychenko,
S. and Lepine,
J.-P. and Matschinger,
H. and Mora,
M. E. M. and Neumark,
Y. and Ormel,
J. and Posada-Villa,
J. and Stein,
D. J. and Tachimori,
H. and Wells,
J. E. and Anthony,
J. C.},
year={2010},
month=jun,
pages={149–159} }