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

Reviewer’s report
Title: 
Selected nasogastric lavage in patients with nonvariceal upper
gastrointestinal bleeding
Version: 
1 
Date: 
19 Feb 2021
Reviewer's report:
The authors had appropriate response to my questions
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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
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