title: Patent ductus arteriosus: a new light on an old problem.
mesh_terms: D000818:Animals; D004373:Ductus Arteriosus / Q000187:drug effects; D004374:Ductus Arteriosus, Patent / Q000503:physiopathology*; D005260:Female; D066298:In Vitro Techniques; D008027:Light; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects; D010100:Oxygen / Q000494:pharmacology*; D011188:Potassium / Q000494:pharmacology; D011247:Pregnancy; D012756:Sheep
chemical_list: D011188:Potassium; D010100:Oxygen