Delayed allergic reactions to betalactams: Four cases with intolerance to amoxicillin or ampicillin and good tolerance to penicillin G and V

1. Vega, J.M.
2. Blanca, M.
3. Carmona, M.J.
4. Garcia, J.
5. Claros, A.
6. Juarez, C.
7. Moya, M.C.