Review for 10.1186/s12876-020-01454-1 (2020)

Reviewer’ s report
Title: The Effect of Prophylactic Hemoclip Placement and Risk Factors of Delayed Post-
polypectomy Bleeding in Polyps Sized 6 to 20 Millimeters: A Propensity Score MatchingAnalysis
Version: 1Date: 03 Aug 2020
Reviewer: Jun Arimoto
Reviewer's report:
This experimental study evaluated the association of prophylactic clipping and the rate of delayed
bleeding. This is a well written study and has novel information. Authors have tried best to revisethe manuscript according to my comments. I feel that this has contributed to improving the qualityof the manuscript.
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YesDeclaration of competing interests
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Creative Commons CC-BY License (http://creativecommons.org/licenses/by/4.0) if this manu-script is accepted for publication. Any comments that I do not wish to be included in the publishedreport have been included as confidential comments to the editor, which will not be published.Ifyou are not happy for us to publish this report, please contact the editorial office before completingthe review.If you wish, you can include your name in your published report. Please note you mustdecide whether to include your name at the start of the process and confirm this decision wheneverprompted. If you change your decision later, we will not be able to publish your name.
I agree to the terms of the CC-BY 4.0 license; please publish my name with my report.Is the study design appropriate to answer the research question (including the use of appropriate
controls), and are the conclusions supported by the evidence presented?
Yes
Are the methods sufficiently described to allow the study to be repeated?
YesIs the use of statistics and treatment of uncertainties appropriate?YesIs the presentation of the work clear?YesAre the images in this manuscript (including electrophoretic gels and blots) free from apparent
manipulation?
Yes