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Body weight (A) and food intake (B) of male Y2−/−, Y4−/−, and Y2−/− Y4−/− double knockout mice compared to those of controls. Data are means ± standard errors of the means per group. The number of mice is indicated in parentheses. *, P < 0.05; **, P < 0.01; and ***, P < 0.001 (versus control or the comparison indicated by horizontal bars).
