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. Author manuscript; available in PMC: 2018 Oct 14.
Published in final edited form as: J Neurosurg. 2016 Mar 11;126(2):495–503. doi: 10.3171/2015.11.JNS15562

Figure 4.

Figure 4.

Graph showing the PIRAMD grade versus proportion of patients who were symptomatic. Vertical dashed lines representPIRAMD Grade 2 (≥ 6) and Grade 3 (10) demarcations, respectively. Figure is available in color online only.