Spine
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Case control study. ⋯ 3.
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Matched case-control epidemiological study. ⋯ 4.
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An imaging anatomical measurement. ⋯ N/A.
Case control study. ⋯ 3.
Matched case-control epidemiological study. ⋯ 4.
An imaging anatomical measurement. ⋯ N/A.