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Contributors XD has selected the relevant references for review, the various cases for illustrations, and has written the outline of the article. AB and MC have written the complete version of the article. All authors have revised the final version of the article.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests MC is a consultant for Boston Scientific and Cook Medical. XD is cofounder and shareholder of Augmented Endoscopy and has acted as a consultant for Alfasigma, Bouchara Recordati, Boston Scientific, Fujifilm, Medtronic, and Pentax.
Patient consent for publication Not required.
Provenance and peer review Commissioned; externally peer reviewed.
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