Review for 10.1186/s12876-019-1141-7 (2019)

Reviewer ’s report  
 
Title: Single -session esophagogastroduodenoscopy and endoscopic ultrasound using a forward -
viewing radial scan ultrasonic endoscope  
 
Version: 0 Date: 24 Oct 2019  
 
Reviewer: Akira Imoto  
 
Reviewer's report:  
 
It 's an interesting study. I think the procedure time (22 minutes) is acceptable for screening.  
1. EUS in the pancreaticobil iary area is shifting to a curved linear array type. Is there a difference 
in the detection rate of lesions in the pancreaticobiliary area in EUS between radial and linear 
types? If there are comparing studies, please describe them and discuss.  
2. Screeni ng of the pancreaticobiliary area with radial type EUS is currently difficult even for 
specialists if they are young. Based on this study, what do you think should be used properly 
between linear and radial EUS? Please describe your opinion in discussion.  
 
 
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 contr ols are required in your comments to the authors.  
 
Unable to asses  
 
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 the manuscript or would you recommen d 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  
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2. Do you hold any stocks or shares in an organisation that may in any way gain or lose  
financi ally 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 salary from an organiz ation 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 th e 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.  
 
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I agree to the open peer review policy of the journal