The estimation of phenotypic correlations (r r p ) with WOMBAT confirmed that the ITs are weakly correlated, except i) among a few cell count traits (WBC, LYM, MON, NEU), and ii) between cell count traits and a few leukocyte subsets (WBC, LYM, CD16 + CD2 + and CD4 -CD8 + ) for whichr r p greater than 0.4 were estimated (Table S2; Figure S1 ). Weakr r p were mainly positive (330) with 166 negative. No strongly negativer r p (#20.4) were found. Taken together, PCA and estimations of phenotypic correlations showed that the level of redundancy between the different immune parameters was limited.