Study Design. To report a new index, the K-line, for deciding the surgical approach for cervical ossification of the posterior longitudinal ligament (OPLL).
研究目的:证实k线作为颈椎后纵韧带骨化手术入路的新标准。
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Objective: To evaluate the correlation of HLA DQA1 alleles with ossification of posterior longitudinal ligament in cervical spine (COPLL).