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Changes in PaO2/FIO2 ratio, PaCO2 and dynamic compliance (Cdyn) in surfactant (SF)‐deficient newborn piglets treated with SF administered by the INSURE method or LISA using a nasogastric tube (NT) or LISAcath®. PaO2/FIO2 (A), PaCO2 (B), and Cdyn (C) values in the INSURE (black square), LISA‐NT (white square) and LISAcath® (white circle) groups. (*)P < 0.05 versus INSURE group (one‐way ANOVA). Values are mean ± SD. BAL, bronchoalveolar lavage; ST, stabilization
