Effects of morphine withdrawal syndrome on endooligopeptidase (ec 3.4.22.19) activity - Paik, S H; Camarao, G C; Bauer, Jarbas Arruda; Leite, Paulo Eduardo Pereira; Oliveira, E S; Camargo, Antonio Carlos Martins de; Farges, R C (European Journal of Pharmacology, 1994)