Fig 8

![Fig 8: Funnel plot from the Ashwagandha sleep meta-analysis assesses potential publication bias by visualizing the symmetry of effect estimates relative to study precision across included trials.](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8462692/bin/pone.0257843.g008.jpg)

> Source: Kae Ling Cheah et al. "Effect of Ashwagandha (Withania somnifera) extract on sleep: A systematic review." *PloS one*, 2021. PMID: [34559859](https://pubmed.ncbi.nlm.nih.gov/34559859/)

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  <img src="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8462692/bin/pone.0257843.g008.jpg" alt="Funnel plot from the Ashwagandha sleep meta-analysis assesses potential publication bias by visualizing the symmetry of effect estimates relative to study precision across included trials." />
  <figcaption>Fig 8. Funnel plot from the Ashwagandha sleep meta-analysis assesses potential publication bias by visualizing the symmetry of effect estimates relative to study precision across included trials.<br>  Source: Kae Ling Cheah et al. "Effect of Ashwagandha (Withania somnifera) extract on sleep: A systematic review." <em>PloS one</em>, 2021. PMID: <a href="https://pubmed.ncbi.nlm.nih.gov/34559859/">34559859</a></figcaption>
</figure>