Figure 3. Effect of a 1-min pretreatment with PA (1 mg/mL) on the proliferative response of HGFs cultured in serum-free medium for 24–72 h.

Each value represents the mean ± standard deviation (n = 4). Significant differences (p<0.05, Tukey–Kramer multiple comparison test) within each group at each time point are denoted by different letters (i.e., bars with the same letter are not significantly different).