[Anal disorders as the initial and only expression of Crohn's disease].

@article{Verhagen1988AnalDA,
  title={[Anal disorders as the initial and only expression of Crohn's disease].},
  author={P F Verhagen and H Berenschot and L Breteler},
  journal={Nederlands tijdschrift voor geneeskunde},
  year={1988},
  volume={132 41},
  pages={1873-5}
}