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(a) Comparison of IL-6 concentrations in the groups of mild to moderate degeneration (grade ≤ 3) and severe degeneration (grade > 3) in terms of a single disc. (b) Comparison of TNF-α concentrations in the groups of mild to moderate degeneration (grade ≤ 3) and severe degeneration (grade > 3) in terms of a single disc.
