Review for 10.1186/s12876-018-0856-1 (2018)

Reviewer ’s report  
 
Title:  Breath test using 13C methacetin does not seem to be useful in the assessment of liver 
function in girls with anorexia nervosa: a case control study  
 
Version: 2 Date: 05 Jul 2018 
 
Reviewer:  Grzegorz  Oracz  
 
Reviewer’s report:  
 
The authors evaluate the usefulness of the 13C labeled Methacetin Breath Test (MBT) in the 
diagnostics of the liver function in girls with AN.  The study is original, prospective, performed 
in large group of girls with AN.  
 
Authors answered for all queries. In my opinion article is interesting and worth to publish.  
 
Are t he 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 the manuscript or would you recommend an 
additional stat istical 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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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 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.  
 
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I agree to the open peer review policy of the journal