Botulinum Toxin Injection Plus Topical Diltiazem for Chronic Anal Fissure: A Randomized Double-Blind Clinical Trial and Long-term Outcome

1. Herreros, B.
2. Espi, A.
3. Montón Rodriguez, C.
4. Granero, E.G.
5. Sanchiz, V.
6. Ferriols, F.L.
7. Almela, P.
8. Hernandez, V.
9. Mora, F.
10. Mínguez, M.