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The proposed mediation model. DPW-PRS, drinks per week PRS; RISK-PRS, first principal component of risky behavior PRS; SS = sensation seeking; PU = positive urgency; NU = negative urgency; LoPe = lack of perseverance; LoPm = lack of premeditation; Y1S = year 1 spring; Y2S = year 2 spring; Y3S = year 3 spring, Y4S = year 4 spring.
