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Tubbs RS, Mortazavi MM, Shoja MM, Loukas M, Cohen-Gadol AA.Tubbs RS, et al.J Neurosurg. 2011 Jun;114(6):1538-40. doi: 10.3171/2011.2.JNS1122. Epub 2011 Mar 4.J Neurosurg. 2011.PMID: 21375378