Review for 10.1186/s12876-020-01561-z (2021)

Reviewer’s report
Title: 
Sedation Practices for Routine Gastrointestinal Endoscopy: A Systematic
Review of Recommendations
Version: 
0 
Date: 
10 Aug 2020
Reviewer's report:
Dear Sir, I read with interest the article by F. Dossa et al. The paper is well
written and scientifically correct.
I have only to add a few comments:
Please remove the figure 1(study flow diagram); it is not necessary.
Please add these two references:
- The Comparison of Midazolam and Propofol in Gastrointestinal Endoscopy: A
Systematic Review and Meta-analysis. 
Zhang R, Lu Q, Wu Y. Surg Laparosc Endosc Percutan Tech. 2018
Jun;28(3):153-158. 
- The Comparison of Etomidate and Propofol Anesthesia in Patients Undergoing
Gastrointestinal Endoscopy: A Systematic Review and Meta-Analysis. 
Ye L, Xiao X, Zhu L. Surg Laparosc Endosc Percutan Tech. 2017 Feb;27(1):1-7.
My best regards
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Is the study design appropriate to answer the research question (including the use
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