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editorial
. 2023 Apr;67(1):7–18.

Figure 2.

Figure 2

Immunohistochemical staining (DAB chromogen) of human IVD tissues obtained at the time of spinal surgery. (a) Substance P, (b) CALCRL, (c) BDNF, (d) NGF, (e) TrkB. Immunohistochemical staining utilized the DAB chromogen with positive staining depicted by brown deposits (white arrows).