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Rao G, Ha CS, Chakrabarti I, Feiz-Erfan I, Mendel E, Rhines LD.Rao G, et al.J Neurosurg Spine. 2006 Aug;5(2):140-5. doi: 10.3171/spi.2006.5.2.140.J Neurosurg Spine. 2006.PMID: 16925080