Three-dimensional endoanal ultrasound to assess the validity of Goodsall’s Rule and the Midline Rule in predicting the path of perianal fistula-in-ano and the location of the internal opening

1. Garcia-Botello, S.
2. Martín-Arévalo, J.
3. Martí-Fernández, R.
4. Moro-Valdezate, D.
5. Pla-Martí, V.
6. Espí-Macías, A.