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Correction notice This article has been corrected since it published Online First. The last author's name has been corrected.
Contributors MK and YI drafted the article. MK and PB critically revised the manuscript for important intellectual content.
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 MK is a consultant for Boston Scientific, Medtronic and Olympus.
Patient consent for publication Not required.
Provenance and peer review Not commissioned; externally peer reviewed.
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