Reviewer’s report
Title: 
Night-shift work duration and breast cancer risk: an updated systematic
review and meta-analysis
Version: 
1 
Date: 
13 Nov 2020
Reviewer's report:
Thank you for this effort.
It is a good 
article review 
for the relationship between night-shift work duration (
long and short ) and breast cancer.
I didn't see any added value as new publication , but for article review I have no
objection to publish it.
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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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