Spine
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A case report. ⋯ N/A.
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Nonrandomized controlled study. ⋯ 3.
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Secondary analysis of data from a double-blind randomized controlled trial. ⋯ 2.
A case report. ⋯ N/A.
Nonrandomized controlled study. ⋯ 3.
Secondary analysis of data from a double-blind randomized controlled trial. ⋯ 2.