Differential involvement of enkephalins in analgesic tolerance, locomotor sensitization, and conditioned place preference induced by morphine.
Marquez P, Baliram R, Gajawada N, Friedman TC, Lutfy K. Differential involvement of enkephalins in analgesic tolerance, locomotor sensitization, and conditioned place preference induced by morphine. Behav Neurosci. 2006 Feb; 120(1):10-5.