[The role of rigid rectosigmoidoscopy, flexible sigmoidoscopy and colonoscopy in screening for colorectal cancer].

@article{Lei1992TheRO,
  title={[The role of rigid rectosigmoidoscopy, flexible sigmoidoscopy and colonoscopy in screening for colorectal cancer].},
  author={Ottmar Lei\ss and Norbert Boerner and Reinhard Gnauck and Eberhard Bock},
  journal={Medizinische Klinik},
  year={1992},
  volume={87 3},
  pages={139-44}
}