Article Text
Endoscopy
Images
Bubbles in the colon
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Footnotes
Contributors JHL planned the study, wrote the manuscript and submitted the manuscript. STGS contributed to the writing of the manuscript. K-KT planned the study and contributed to the writing of the manuscript.
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 None declared.
Provenance and peer review Not commissioned; externally peer reviewed.