Images in focus. Self-knotting of feeding tube.

@article{Ha2001ImagesIF,
  title={Images in focus. Self-knotting of feeding tube.},
  author={J. P. Y. Ha and Wing Tai Siu and C. N. Tang and Michael K. W. Li},
  journal={Endoscopy},
  year={2001},
  volume={33 7},
  pages={
          644
        }
}

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