Secondary-peak profile of methadone in saliva after administration of multiple doses in patients with chronic pain

1. Vázquez, M.
2. Fagiolino, P.
3. Lorier, M.
4. Guevara, N.
5. Maldonado, C.
6. Ibarra, M.
7. Montes, M.J.
8. Retamoso, I.