Spine
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A retrospective database study. ⋯ 3.
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A case-control study. ⋯ 4.
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A retrospective, single-institute, and radiographic study. ⋯ 4.
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A retrospective study. ⋯ 3.
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Biological augmentation spinal arthrodesis trial in athymic rats. ⋯ N/A.