Fig. 3

Behavioral testing in the DLB test (mean ± SEM). (A) Time spent in the light chamber of the DLB in E-cig, E-cig + CDP, E-cig quitting + CDP, control, and CDP groups at different time points; (B ) Latency to enter the dark chamber of the DLB in E-cig, E-cig + CDP, E-cig quitting + CDP, control, and CDP groups at different time points (C) Frequency of stretching of the DLB in E-cig, E-cig + CDP, E-cig quitting + CDP, control, and CDP groups at different time points (*p < 0.05, **p < 0.01, n = 7 for each group).