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Botulinum toxin promoted healing and relieved symptoms of chronic anal fissure.

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  • Source of funding: in part, Consiglio Nazionale delle Ricerche.

  • For correspondence: Dr A Albanese, Istituto di Neurologia, Università Cattolica, Largo Argostino Gemelli 8, I-00168 Rome, Italy. Fax +39-635-501909.