Review for 10.1186/s12876-021-01690-z (2021)

Reviewer’s report
Title: 
Selected nasogastric lavage in patients with nonvariceal upper
gastrointestinal bleeding
Version: 
0 
Date: 
13 Dec 2020
Reviewer's report:
This study was concerned with the usefulness of L-tube in acute upper
gastrointestinal bleeding. I agree with your author's opinion, and I think this is
well-written study. 
It was a good study that could lead to reduction of unnecessary waste of medical
resources and fatigue of medical staff. I couldn't find a part to correct.
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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?
Yes
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Yes
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Yes
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from apparent manipulation?
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