Finally, we studied correlations between all probes and cortisol level when it reaches its peak in blood after LPS injection. Thus, Pearson correlations, ρ, were computed between DEP expression at each time step and cortisol level at t=+4. A correlation test was then performed to test the null hypothesis, H 0: ρ=0 against H 1: ρ≠0. Multiple testing was handled by using a BH approach (FDR <5%). This list of genes will be referred as (List3) in the sequel.