RT Journal Article SR Electronic T1 Endogenous orphanin FQ / nociceptin is involved in the development of morphine tolerance JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics DO 10.1124/jpet.106.103960 A1 Shinjae Chung A1 Sigrun Pohl A1 Joanne Zeng A1 Olivier Civelli A1 Rainer K. Reinscheid YR 2006 UL http://jpet.aspetjournals.org/content/early/2006/04/04/jpet.106.103960.abstract AB