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Light microscopy image of von Kossa staining of disc tissue removed by sequestrectomy after: A Recurrent disc herniation of an ADCT-treated patient (group-1); B Recurrent disc herniation of an ADCT-treated patient (group-1); C Recurrent disc herniation of a conventionally treated patient (group-2); D Single disc herniation of a conventionally treated patient (group-3)
