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Spinner RJ, Atkinson JL, Scheithauer BW, Rock MG, Birch R, Kim TA, Kliot M, Kline DG, Tiel RL.Spinner RJ, et al.J Neurosurg. 2003 Aug;99(2):319-29. doi: 10.3171/jns.2003.99.2.0319.J Neurosurg. 2003.PMID: 12924707Clinical Trial.