Spine
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Observational Study
Effect of body mass on oxygenation and intra-abdominal pressure when using a Jackson surgical table in the prone position during lumbar surgery.
Prospective observational study. ⋯ 4.
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A retrospective case-control study. ⋯ 3.
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Cross-sectional study. ⋯ 3.
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Retrospective large population-based study. ⋯ 4.