Strain differences in the dose-response relationship for morphine self-administration and impulsive choice between Lewis and Fischer 344 rats

1. García-Lecumberri, C.
2. Torres, I.
3. Martín, S.
4. Crespo, J.A.
5. Miguéns, M.
6. Nicanor, C.
7. Higuera-Matas, A.
8. Ambrosio, E.