[Prospective and retrospective].

@article{Nylenna2016ProspectiveAR,
  title={[Prospective and retrospective].},
  author={Magne Nylenna},
  journal={Tidsskrift for den Norske laegeforening : tidsskrift for praktisk medicin, ny raekke},
  year={2016},
  volume={136 10},
  pages={936}
}