RT Journal Article SR Electronic T1 Modulation of Oral Morphine Antinociceptive Tolerance and Naloxone-Precipitated Withdrawal Signs by Oral δ9-THC JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics DO 10.1124/jpet.102.046870 A1 Diana L. Cichewicz A1 Sandra P. Welch YR 2003 UL http://jpet.aspetjournals.org/content/early/2003/02/11/jpet.102.046870.abstract AB