Correction: Posterior Fixation and Fusion (PFF) versus Combined Anterior and Posterior Fixation and Fusion (CAPFF) for type B and C thoracolumbar spine injuries: a systematic review and meta-analysis - Vincent L. Mkochi; Hari Sharma; Alexis G. Gonzalez; Hao-Hua Wu; Harvard Global Orthopaedics Spine Study Group (Journal of Orthopaedic Surgery and Research)