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Micrographs of the nucleus pulposus obtained from patients who underwent surgery 3 months after condoliase injection (A,B) and the similar-aged patients in whom condoliase was not injected (C,D). Staining: (A,C) hematoxylin and eosin; (B,D) toluidine blue. Magnification of microscope: (A–D) ×20.
