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Chronic jetlag (CJL) increased corticosterone levels. This figure shows the plasma total corticosterone in C57/BL6 mice treated with phase advance CJL for 30 days, on four different time points (ZT1, ZT7, ZT13, and ZT19). Total corticosterone in a sample of tail blood was measured. All data are presented as means ± SEM, *P < 0.05, **P < 0.01, student’s t-test (n = 4).
