TY - RPRT TI - Chronic opiate agonists down-regulate prodynorphin gene expression in rat brain. AU - P Romualdi AU - G Lesa AU - S Ferri PY - 1991 DO - 10.1016/0006-8993(91)91525-6 UR - https://pubmed.ncbi.nlm.nih.gov/1786525/ ID - 1786525 ER -