Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

33 questions · 34 findings · 18 reviews · Airways

No studies found 6 · 17.6%GRADE not reported 1 · 2.9%Very low 4 · 11.8%Low 14 · 41.2%Moderate 8 · 23.5%High 1 · 2.9%