<p>A. Histogram of eigenvalues. The eigenvalues, which corresponds to the amount of variance accounted by each component, are presented for the first ten components. The two first components, which explain more than 50% of the total variance, are in black. B. First factorial plan (x-axis: first component, y-axis: second component). The plan composed by the two first axis or dimensions is represented. It corresponds to an approximation of the cloud of points by a 2-dimensional space. C. Absolute contribution of each cytokine to the variance of the second component.</p
