| http://www.w3.org/ns/prov#value | - a longitudinal member positionable along a spinal column; and a fastener assembly, comprising: a fastener including a lower portion for contacting a bone and an upper portion integral with the lower portion with a longitudinal axis extending from a proximal end to a distal end and lying in a central plane, the upper portion having two channels, wherein each channel has a lateral opening with respe
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