CD4 and Sepsis: A higher proportion of CD4 + cells infiltrated the left ventricle in male iRHOM2−/− mice 18 h after sepsis (31.9 ± 5.1% CD45 + cells), compared to 13.4 ± 3.4% in female iRHOM2−/− mice (p = 0.02; Fig. 9F).