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M. J. LYONS,
J. L. BAR,
M. S. PANIZZON,
R. TOOMEY,
S. EISEN,
H. XIAN
and M. T. TSUANG
(2004).
Neuropsychological consequences of regular marijuana use: a twin study. Psychological Medicine,
34
,
pp 1239-1250
doi:10.1017/S0033291704002260