The addition of benzylpenicillin does not increase the skin test sensitivity obtained with classic ß-lactam determinants

1. Lacombe-Barrios, J.
2. Salas, M.
3. Gómez, F.
4. Doña, I.
5. Ariza, A.
6. Mayorga, C.
7. Blanca, M.
8. Montañez, M.I.
9. Torres, M.J.