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。
Mouse uterine cervical cancer cell line U14 was used as the antigen to immunize mice.
以小鼠宫颈癌细胞系u14为抗原免疫小鼠。
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