Figure 4.

Results of PCA on the overall dataset in first derivative: score plots of PC₂ vs. PC₁ (a) and of PC₄ vs. PC₃ (b). Muscle measurements are indicated in red and skin measurements in blue; empty circles = controls at 3 h (18 muscle and 18 skin samples); full circles = 3 h treated (18 muscle and 18 skin samples); empty triangles = controls at 24 h (18 muscle and 18 skin samples); full triangles = 24 h treated (18 muscle and 18 skin samples).