On replacing the surfactant.
D000818:Animals; D006801:Humans; D006819:Hyaline Membrane Disease / Q000188:drug therapy*; D007231:Infant, Newborn; D010743:Phospholipids / Q000008:administration & dosage; D011817:Rabbits; D012756:Sheep; D013501:Surface-Active Agents / Q000008:administration & dosage*
D010743:Phospholipids; D013501:Surface-Active Agents