There have been studies that have reported on degeneration occurring at the cephalad and caudad levels adjacent to the fused levels.
已经有研究证明退变发生于融合节段的上位节段和下位节段。
There have been studies that have reported on degeneration occurring at the cephalad and caudad levels adjacent to the fused levels.
已经有研究证明退变发生于融合节段的上位节段和下位节段。
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