Review for 10.1186/s12876-022-02217-w (2022)

Reviewer’s report
Title: 
Perioperative changes in cell-free DNA for patients undergoing surgery
for colon cancer
Version: 
1 
Date: 
23 Feb 2022
Reviewer's report:
Although a small sample and a retrospective analysis, a good start to work over.
Interesting paper to read, to know about and as above written, to go on with
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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
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from apparent manipulation?
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