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Serum endothelial permeability marker levels in ground squirrels. (A) Serum levels of HS. (B) Serum levels of Sy-1. SA: summer active, LT: late torpor, IBA: interbout arousal. Mean ± SEM. n = 6. Significant differences between SA conditions are denoted as follows: * p < 0.05, ** p < 0.01, whereas significant differences in IBA as compared with LT are denoted by ## p < 0.01.
