Spine
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Longitudinal cohort. ⋯ 2.
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Randomized experimental study. ⋯ NA.
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An in vitro study examining factors produced by human mesenchymal stem cells on spine implant materials. ⋯ N/A.
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Clinical trial for midcervical pedicle screw insertion using a novel patient-specific intraoperative screw guiding device. ⋯ 3.
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Retrospective cohort study. ⋯ 4.