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George O, Ghozland S, Azar MR, Cottone P, Zorrilla EP, Parsons LH, O'Dell LE, Richardson HN, Koob GF.George O, et al. Among authors: cottone p.Proc Natl Acad Sci U S A. 2007 Oct 23;104(43):17198-203. doi: 10.1073/pnas.0707585104. Epub 2007 Oct 5.Proc Natl Acad Sci U S A. 2007.PMID: 17921249Free PMC article.