Expiratory airflow at 7–8 years of age in children born extremely low birthweight from 14 years before to 14 years after the introduction of exogenous surfactantResearch in context... oleh Lex W. Doyle, S. Ranganathan, A.J. Spittle, G. Opie, R.M. Mainzer, Jeanie L.Y. Cheong, Jeanie Cheong, Peter Anderson, Rosemarie Boland, Margaret Charlton, Noni Davis, Lex W. Doyle, Julianne Duff, Elisha Josev, Katherine Lee, Rheanna Mainzer, Marion McDonald, Bronwyn Novella, Joy Olsen, Gillian Opie, Lauren Pigdon, Gehan Roberts, Alicia Spittle, Penelope Stevens, Alice Stewart