Has the incidence of perforated peptic ulcer decreased over the last decade?

1. Sánchez-Bueno, F.
2. Marín, P.
3. Ríos, A.
4. Aguayo, J.L.
5. Robles, R.
6. Piñero, A.
7. Fernández, J.A.
8. Parrilla, P.