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Bjorklund LM, Sánchez-Pernaute R, Chung S, Andersson T, Chen IY, McNaught KS, Brownell AL, Jenkins BG, Wahlestedt C, Kim KS, Isacson O.Bjorklund LM, et al.Proc Natl Acad Sci U S A. 2002 Feb 19;99(4):2344-9. doi: 10.1073/pnas.022438099. Epub 2002 Jan 8.Proc Natl Acad Sci U S A. 2002.PMID: 11782534Free PMC article.