Review for 10.1186/s12876-021-01881-8 (2021)

Reviewer’s report
Title: 
Mucormycosis-induced upper gastrointestinal ulcer perforation in
immunocompetent patients: A report of two cases
Version: 
0 
Date: 
01 Mar 2021
Reviewer's report:
The manuscript reports two patients with upper gastrointestinal ulcer perforation
caused by mucormycosis. The authors argue that surgical treatment could be
considered if fungal infection is suspected according to clinical diagnosis. 
This case is interesting, but I have some comments.
My comments are as follows.
1) Adding endoscopy and computed tomography images makes this case report
even more informative.
2) The authors diagnosed mucor infection by pathological examination. Did you
identify the species of mucor?
3) In addition to gastrectomy, a duodenostomy or a jejunostomy was placed. Did
this have a positive effect on the clinical course of these cases?
4) Please add intraoperative images if you have.
I hope these comments will be helpful.
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Is the study design appropriate to answer the research question (including the use
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