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. 2017 Mar 30;12(3):e0174822. doi: 10.1371/journal.pone.0174822

Fig 4.

Fig 4

Forest plots of the included studies comparing NDI scores (a), neck pain scores (b) and arm pain scores (c) in patients who underwent DCDA and those who underwent ACDF. NDI: neck disability index, DCDA: discover cervical disc arthroplasty, ACDF: anterior cervical discectomy and fusion.