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Figure 1: Daily caffeine intake for female Wistar (light gray bar) and P (dark gray bar) rats given 24-hour continuous access to multiple caffeine concentrations (0.3, and 1.0 mg/ml), with food and water available ad lib (n = 12/line).The total amount reflects the sum of daily intake of 0.3 and 1.0 mg/ ml caffeine. *, indicates p < 0.05 vs. Wistar; +, indicates p < 0.05 vs. 0.3 mg/ml caffeine concentration. |