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Northrup BE, Vaccaro AR, Rosen JE, Balderston RA, Cotler JM.Northrup BE, et al. Among authors: cotler jm.Spine (Phila Pa 1976). 1995 Nov 15;20(22):2449-53. doi: 10.1097/00007632-199511001-00014.Spine (Phila Pa 1976). 1995.PMID: 8578397