Additional causes of postoperative complications in premature infants.
D001049:Apnea / Q000209:etiology*; D006801:Humans; D000860:Hypoxia / Q000150:complications*; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases / Q000209:etiology*; D011183:Postoperative Complications; D014939:Work of Breathing