at http://www.scripps.edu/cnad/inia/modelmousedrinkingindark.pdf or from the authors on request. Previous studies showed that individual intake values for C57BL/6J mice for DID on the first day of exposure were not highly correlated with DID intakes on Days 2–4 but that intakes on the second day were well correlated with Days 3 and 4 (12) and for up to 12 further days of drinking (data not shown). Therefore, we elected to use a 2-day DID test.
