NOVI cohort only (after BPD development):- ACS exposure correlated with differential methylation in HPA axis-related genes, including FKBP5, NR3C1, NR3C2, CRHR1, POMC, and HSP90AA- The most significant differentially methylated site in the body of NR3C1. The gene discussed is NR3C2; the disease is bronchopulmonary dysplasia.