Authors: Leite-Panissi, CRA Rodrigues, CL Brentegani, MR Menescal-de-Oliveira, L

Citation: Cra. Leite-panissi et al., Endogenous opiate analgesia induced by tonic immobility in guinea pigs, BRAZ J MED, 34(2), 2001, pp. 245-250