[Persistent ductus arteriosus in premature infants].

@article{Petersen1983PersistentDA,
  title={[Persistent ductus arteriosus in premature infants].},
  author={Sven Petersen and Nicolai Christian Christensen and Peter Lauridsen and Svend Arne Pedersen and E Ryssing},
  journal={Ugeskrift for laeger},
  year={1983},
  volume={145 46},
  pages={3560-3}
}