Former-preterm lambs have persistent alveolar simplification at 2 and 5 months corrected postnatal age. - Dahl MJ; Bowen S; Aoki T; Rebentisch A; Dawson E; Pettet L; Emerson H; Yu B; Wang Z; Yang H; Zhang C; Presson AP; et al. (American journal of physiology. Lung cellular and molecular physiology, 2018)