This systematic review and meta-analysis was conducted and reported according to PRISMA (Preferred Reporting Guidelines for Systematic Reviews) guidelines [15 ]. A protocol was developed (CRD42022324844) and submitted to PROSPERO. The protocol can be assessed @ https://www.crd.york.ac.uk/prospero/export_details_pdf.php. The systematic review protocol clearly described the intention to study the bidirectional relationship between erosive toothwear and asthma and its related medications. Since majority of the studies reported the prevalence of erosive toothwear asthmatics, this study is particularly restricted to erosive tooth wear. Since this is a meta-analysis, formal ethics approval is not required for this type of study.
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