Review for 10.1186/s12876-016-0435-2 (2016)

Reviewer ’s report  
 
Title: Abdominal migraine in children: Association between gastric motility parameters and 
clinical characteristics  
 
 
Version: 0 Date: 20 Oct 2015  
 
 
Reviewer: M. Masudur  Rahman  
 
 
Reviewer's report:  
 
Comments  
1. Sample size is a limitation.  
 
2. Authors need to provide further details of enrollment of the patients, whether 
enrollment was consecutive.  
 
3. Validity and reliability of the ultrasonogram for the assessment gastric motility 
needs to be elaborated and original validation study(s) need to be cited.  
 
4. Details of assessment of stress need to be mentioned in the method section.  
 
5. What relieving factors were assessed needs to be mentioned in the method 
section.  
 
6.  The name of the drugs that impair motility and were excluded need to be 
mentioned.  
 
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 ade quately 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 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 recommend additional statistical review  
 
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 y ears 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 i n any way gain 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 salary 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 com peting 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  
 
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on my report to the authors and, if the manuscript is accepted for publication, my named report  
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I agree to the open peer review policy of the journal