F2RL2 and hydrops fetalis: The other top hub-genes of candidate DcoExp modules in the HF group, harboring fixed functional variants, were as follows: IQCG (Tan H), MAPKAP1 (Grey60 HF), MDM4 (Red HF), F2RL2 (Saddlebrown HF), MIA3 (Green HF), and PPP1R12B (Lightgreen HF).