Cunningham Kathryn A, Watson Cheryl S
Departments of Pharmacology and Toxicology and Biochemistry and Molecular Biology, Center for Addiction Research, University of Texas Medical Branch, Galveston, TX 77555-1031, USA.
Proc Natl Acad Sci U S A. 2008 Feb 19;105(7):2259-60. doi: 10.1073/pnas.0800029105. Epub 2008 Feb 12.