“…The mean gestational age in the present cohort was 27.9 weeks, similar to the mean gestational age of two other cohorts: 27.7 weeks (31) and 28.2 weeks (32). The incidence of pneumothorax, necrotizing enterocolitis, patent ductus arteriosus, retinopathy of prematurity, neonatal pneumonia or sepsis, and maternal factors, such as gestational diabetes, bleeding or prolonged rupture of membrane, were comparable with previously published studies (23,(31)(32)(33)(34)(35). In our cohort, 37% had severe BPD and 16.7% died, comparable with the 41% of severe BPD subjects in another study (31), and a reported 15.7% mortality in yet another study (33).…”