TGFB1 and hydrops fetalis: Quantification of xenograft TGF-β1 levels by ELISA assay revealed that the levels of TGF-β1 in the RT group was higher than in the NC group (P < 0.05), but the level of TGF-β1 in the RT+HF group and RT+SB group was significantly lower than in the RT group (P < 0.05) (Figure 6B).