Review for 10.1186/s12876-021-01683-y (2021)

Reviewer’s report
Title: 
Collision of Epstein-Barr virus-positive and -negative gastric cancer, diagnosed by molecular
analysis: A case report
Version: 
1 
Date: 
10 Feb 2021
Reviewer's report:
This version is much improved compared to the first version.
Minor comments
1. Line 27: "since the lymph nodes and lung metastasis were diagnosed" should be changed to "since
lymph node and lung metastases were diagnosed".
2. In the legend for figure 1, right and left are reversed. It should say duodenum on the left (a) and
gastroesophageal junction on the right (b).
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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
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Yes
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manipulation?
Yes