title: [Ligation of patent ductus arteriosus in extremely immature infants--preoperative complications and postoperative outcomes].
mesh_terms: D004374:Ductus Arteriosus, Patent / Q000601:surgery*; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases / Q000601:surgery*; D008026:Ligation; D008297:Male; D010102:Oxygen Inhalation Therapy; D011183:Postoperative Complications / Q000628:therapy; D012131:Respiratory Insufficiency / Q000628:therapy*