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Ryan PL, Christiansen DL, Hopper RM, Bagnell CA, Vaala WE, Leblanc MM.Ryan PL, et al. Among authors: christiansen dl.Ann N Y Acad Sci. 2009 Apr;1160:169-78. doi: 10.1111/j.1749-6632.2008.03802.x.Ann N Y Acad Sci. 2009.PMID: 19416181
Chowdhury SA, Christiansen DL, Morgan ML, DeAngelis GC.Chowdhury SA, et al. Among authors: christiansen dl.J Neurophysiol. 2008 Feb;99(2):876-87. doi: 10.1152/jn.00732.2007. Epub 2007 Dec 12.J Neurophysiol. 2008.PMID: 18077666Free PMC article.