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. 2022 Jul 21;30(9):3138–3154. doi: 10.1007/s00167-022-07065-5

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Fig. 4 — Forest plot of the comparison: ROM (IV: inverse variance; CI: confidence interval). The square represents the effect of each single study. The horizontal line represents the confidence interval of each study. The vertical line “0” represent the no effect threshold. The diamond represents the final effect of the overall analysis