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Forest plots showing the direct and indirect results of post-operative reoperation rates and postoperative work status of head-to-head comparisons. ABG, anterior cervical discectomy with autologous bone graft; ABGP, anterior cervical discectomy with allograft bone graft plus plating; ACD, anterior cervical discectomy; ACDF, anterior cervical discectomy and fusion; CDR, cervical disc replacement; PCF, posterior cervical foraminotomy.
