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AimsTo estimate genetic and environmental contributions to alcohol consumption from early adolescence to young adulthood, and test whether gender moderates these effects.
DesignLongitudinal twin cohort design.
SettingPopulation‐based sample from Norway.
ParticipantsA total of 2862 male and female twins, aged 14–22 years, were assessed at one (n = 881), two (n = 898) or three (n = 1083) occasions...
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