Spine
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A retrospective data review. ⋯ 4.
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Single institution retrospective clinical review. ⋯ 3.
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A retrospective clinical study. ⋯ 3.
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Case-control study of an animal model. ⋯ N/A.
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Multicenter Study
Adverse Events Related to Transcranial Electric Stimulation for Motor-evoked Potential Monitoring in High-risk Spinal Surgery.
Prospective multicenter study. ⋯ 4.