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Drinking in HDID-1 male mice with intermittent (closed symbols) or continuous (open symbols) access to a single bottle of 20% ethanol 4 h/day. Daily intakes during the first week are shown in the left panel. Access was for only 2 h on the first 2 days of Week 1. Average drinking for MWF in Weeks 2–5 is shown in the right panels. Means ± SE are shown.
