Review for 10.1186/s12876-020-01361-5 (2020)

Reviewer ’s report  
 
Title: Cap-assisted endoscopy increases ampulla of Vater visualization in high -risk patients   
 
Version: 1 Date: 05 May 2020  
 
Reviewer's report:  
 
In your revised text, the previously identified numerical errors were not fully resolved. In Table 
4 under CAE, the n for the group with co mplete AV visualization and scopolamine not given 
should be "77" (77.8%). You had only corrected the percentage error (i.e. 77.8%) but not the 
actual number which was still stated as "75".  
 
 
Are the methods appropriate and well described?  
If not, please specify what is required in your comments to the authors.  
 
Yes 
 
Does the work include the necessary controls?  
If not, please specify which controls are required in your comments to the authors.  
 
Yes 
 
Are the conclusions drawn adequately supported by the data shown?  
If not, please explain in your comments to the authors.  
 
Yes 
 
Are you able to assess any statistics in t he manuscript or would you recommend an  
additional statistical review?  
If an additional statistical review is recommended, please specify what aspects require further  
assessment in your comments to the editors.  
 
I am able to assess the statistics  
 
Quality of  written English  
Please indicate the quality of language in the manuscript:  
 
Acceptable  
 
Declaration of competing interests  
Please complete a declaration of competing interests, considering the following questions:  
 
1. Have you in the past five years received  reimbursements, fees, funding, or salary from an  
organisation that may in any way gain or lose financially from the publication of this  
manuscript, either now or in the future?  
 
2. Do you hold any stocks or shares in an organisation that may in any way gai n or lose  
financially from the publication of this manuscript, either now or in the future?  
 
3. Do you hold or are you currently applying for any patents relating to the content of the  
manuscript?  
 
4. Have you received reimbursements, fees, funding, or salar y from an organization that 
holds  or has applied for patents relating to the content of the manuscript?  
 
5. Do you have any other financial competing interests?  
 
6. Do you have any non -financial competing interests in relation to this paper?  
 
If you can answer no to all of the above, write 'I declare that I have no competing interests' 
below.  If your reply is yes to any, please give details below.  
 
I declare that I have no competing interests  
 
Reviewer Pub lication Consent. I agree for my report to be made available under an Open 
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manuscript  is accepted for publication. Any comments that I do not wish to be included in the 
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I agree to the terms of the CC -BY 4.0 license; please do not publish my name with my report.  
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