RBL2 and lung disorder: Based on pathway enrichment analysis (Table 4), genes altered in BPD blood cells were mainly enriched in cell cycle regulation and arrest (e.g., PPP2CA, RBL2, CENPU, CCNY, CDK6) and pulmonary disorder and developmental disorders (e.g., AGER, ITGA6, CA4, BACH2, IGFBP2, BMPR2, SKI, DAB2).