IL1RAP and hydrops fetalis: The mean RV/LV expression ratio showed twofold higher RV expression of IL1-RaP (HF: 2.113 ± 0.369; MCS: 1.964 ± 0.2156, Figure 2B(III)) and IL-33 (HF: 1.734 ± 0.2910; MCS: 2.062 ± 0.258, Figure 2B(IV)).