Review for 10.1186/s12876-021-01898-z (2021)

Reviewer’s report
Title: 
Utility of the Narrow-band imaging International Colorectal
Endoscopic classification for optical diagnosis of colorectal polyp histology in
clinical practice: a retrospective study
Version: 
0 
Date: 
19 Apr 2021
Reviewer's report:
Well done and interesting paper to read and to know
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Is the study design appropriate to answer the research question (including the use
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