Reviewer’s report
Title: 
Serum Antioxidant Vitamin Concentrations and Oxidative Stress Markers
Associated with Symptoms and Severity of Premenstrual Syndrome: A
Prospective Cohort Study
Version: 
1 
Date: 
18 Sep 2020
Reviewer's report:
I am happy with the revision.
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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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Are the methods sufficiently described to allow the study to be repeated?
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from apparent manipulation?
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