High-dose botulinum toxin in chronic anal fissure treatment: Short term results . Annals of Medical Research, [S. l.], v. 26, n. 3, p. 0351–0354, 2021. Disponível em: http://www.annalsmedres.org/index.php/aomr/article/view/1355. Acesso em: 10 may. 2025.