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Changes in sucrose preference in six groups of rats. (A) Changes in sucrose preference in six groups of rats in 50 days. (B) Sucrose preference on day 22. (C) Sucrose preference on day 35. (D) Sucrose preference on day 50 (‾x ± s, n = 8). *p < 0.05, **p < 0.01 vs CON; ♦ p < 0.05 vs CUMS.
