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Johnson MD, Woodard A, Kim P, Frexes-Steed M.Johnson MD, et al.J Neurosurg. 2001 Feb;94(2):293-300. doi: 10.3171/jns.2001.94.2.0293.J Neurosurg. 2001.PMID: 11213968
Johnson MD, Woodard A, Okediji EJ, Toms SA, Allen GS.Johnson MD, et al.J Neurooncol. 2002 Jan;56(2):133-42. doi: 10.1023/a:1014588214966.J Neurooncol. 2002.PMID: 11995814
Johnson MD, Okedli E, Woodard A, Toms SA, Allen GS.Johnson MD, et al.J Neurosurg. 2002 Sep;97(3):668-75. doi: 10.3171/jns.2002.97.3.0668.J Neurosurg. 2002.PMID: 12296652
Johnson MD, Tulipan N, Whetsell WO Jr.Johnson MD, et al.Neurosurgery. 1989 Apr;24(4):587-90. doi: 10.1227/00006123-198904000-00017.Neurosurgery. 1989.PMID: 2710303