Reviewer’s report
Title: 
Night-shift work duration and breast cancer risk: an updated systematic
review and meta-analysis
Version: 
1 
Date: 
07 Nov 2020
Reviewer's report:
The authors need to enhance the language of the manuscript. In certain parts of
the paper it is really hard to follow. Also, there are about 10 important papers
that were published in PubMed during 2020 on the relation between night shift
work and breast cancer, authors need to update their analysis based on the
available literature.
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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
Are the methods sufficiently described to allow the study to be repeated?
Yes
Is the use of statistics and treatment of uncertainties appropriate?
Yes
Is the presentation of the work clear?
No
Are the images in this manuscript (including electrophoretic gels and blots) free
from apparent manipulation?
No