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NATHAN A. GILLESPIE,
KENNETH S. KENDLER,
CAROL A. PRESCOTT,
STEVEN H. AGGEN,
CHARLES O. GARDNER,
KRISTEN JACOBSON
and MICHAEL C. NEALE
(2007).
Longitudinal modeling of genetic and environmental influences on self-reported availability of psychoactive substances: alcohol, cigarettes, marijuana, cocaine and stimulants. Psychological Medicine,
37
,
pp 947-959
doi:10.1017/S0033291707009920