Fig. 1From: Neurobiological substrates of chronic low back pain (CLBP): a brain [99mTc]Tc-ECD SPECT studyScatter plot showing no correlation between DN4 and NRS scales for 14 patients (Spearman’s Kendall’s rho 0.357, p = 0.211). DN4 Douleur Neuropathique en 4 Questions; NRS Numeric Rating ScaleBack to article page