Headaches in the treatment of anal fissure.

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@article{Salgado1999HeadachesIT, title={Headaches in the treatment of anal fissure.}, author={Gervasio Salgado and L Torrbedella and Irwin R Berman}, journal={Diseases of the colon and rectum}, year={1999}, volume={42 8}, pages={1106} }