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Characteristics of patients and results of instrumentation
*Numbers of in-pedicle screws, †Pedicle violation <2 mm, ‡Pedicle violation >2 mm. OPLL : ossification of posterior longitudinal ligament, O : occipitum, C : cervical spine, AIF : anterior interbody fusion, TA : trauma, DS : degenerative spondylosis, RA : rheumatoid arthritis
