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Summary of quality of life instruments and symptom severity scales employed in the vitamin D-IBS trials. Heterogeneity in outcome measurement tools is documented.

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![Figure 4: Summary of quality of life instruments and symptom severity scales employed in the vitamin D-IBS trials. Heterogeneity in outcome measurement tools is documented.]()

> Source: Mohamed Abuelazm et al. "The Effect of Vitamin D Supplementation on the Severity of Symptoms and the Qual." *Nutrients*, 2022. PMID: [35807798](https://pubmed.ncbi.nlm.nih.gov/35807798/)
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  <img src="" alt="Summary of quality of life instruments and symptom severity scales employed in the vitamin D-IBS trials. Heterogeneity in outcome measurement tools is documented." />
  <figcaption>Figure 4. Summary of quality of life instruments and symptom severity scales employed in the vitamin D-IBS trials. Heterogeneity in outcome measurement tools is documented.<br>  Source: Mohamed Abuelazm et al. "The Effect of Vitamin D Supplementation on the Severity of Symptoms and the Qual." <em>Nutrients</em>, 2022. PMID: <a href="https://pubmed.ncbi.nlm.nih.gov/35807798/">35807798</a></figcaption>
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