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Harrop JS, Sharan A, Anderson G, Hillibrand AS, Albert TJ, Flanders A, Vaccaro AR.Harrop JS, et al.Spine (Phila Pa 1976). 2005 Jul 15;30(14):E417-9. doi: 10.1097/01.brs.0000170594.45021.67.Spine (Phila Pa 1976). 2005.PMID: 16025019