%0 Journal Article %A A W Jones %A A Neri %A E AnggÄrd %T Prolonged excretion of morphine in rats during protracted abstinence: lack of effect of naltrexone. %D 1983 %J Journal of Pharmacology and Experimental Therapeutics %P 419-423 %V 224 %N 2 %U https://jpet.aspetjournals.org/content/jpet/224/2/419.full.pdf