M. Sharifzadeh, H.R. Sadeghipour, F. Khoshjou, A. Khalaj, M. AbdoIIahi, M.Baradaran. EFFECTS OF ACUTE AND CHRONIC LITHIUM ON MORPHINE-INDUCED ANALGESIA IN MICE BY FORMALIN TEST. Acta Med Iran. 1;37(1):37-44.