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Al-Gahtany M, Cusimano M, Singer W, Bilbao J, Kovacs K, Marotta T.Al-Gahtany M, et al.J Neurosurg. 2003 Feb;98(2):417-20. doi: 10.3171/jns.2003.98.2.0417.J Neurosurg. 2003.PMID: 12593633Review.