Review for 10.1186/s12876-021-02018-7 (2021)

Reviewer’s report
Title: 
Endoscopic negative pressure therapy as stand-alone treatment for
perforated duodenal diverticulum – presentation of two cases
Version: 
1 
Date: 
13 Sep 2021
Reviewer's report:
This is the first report on successful Endoscopic negative pressure therapy
(ENPT) in patients with duodenal diverticula perforation, has a good course after
treatment.
However, the authors should clarify/correct the points listed below. I hope that
my comment is extremely useful for the improvement of the article. 
Major
1) Why did the authors choose ENPT and not surgery? The authors need to add
the reasons and indications for these cases. 
2) The devices and procedures can only be referred to texts and literature, and
there is no concrete image of the two cases performed by the authors. Therefore,
I found some of the authors' explanations difficult to follow; I suspect a reader
less familiar with the topic might have even greater difficulties. The authors need
to add endoscopic images and X-P images after tube placement for these cases.
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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?
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