Incidence and evolution of foreign body impaction in the upper gastrointestinal tract and its relationship with eosionophilic oesophagitis

1. Arratibel, P.
2. Gil-Lasa, I.
3. Cobian, J.
4. Izagirre-Arostegi, A.
5. Arzallus, T.
6. Etxart, A.
7. Sarasqueta, C.
8. Zubiaurre, L.
9. Bujanda, L.