Review for 10.1186/s12876-016-0533-1 (2016)

Reviewer ’s report  
 
Title: Collagenous Colitis Presenting as Spontaneous Perfo ration in an 80 year old woman: 
Report  of a Case  
 
Version: 2 Date: 21 Aug  2016  
 
Reviewer: David Sachar  
 
Reviewer's report:  
 
The authors have done a heroic job of addressing my concern about ruling out concomitant 
ischemia. It might be appropriate for them to indicate that they have not had the opportunity to 
subject pre viously -published reports to similar personal scrutiny; but that at least in their own 
case, they can be confident of having ruled out this independent complication.  
 
 
 
 
Are the methods appropri ate 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.  
 
No 
 
Are the conclusions dr awn adequately supported by the data shown?  
If not, please explain in your comments to the authors.  
 
No 
 
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.  
 
Not relevant to this manuscript  
 
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, fund ing, 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.  
 
...no competing interests.  
 
I agree to the open peer review policy of the journal. I understand that my name will be incl uded  
on my report to the authors and, if the manuscript is accepted for publication, my named report  
including any attachments I upload will be posted on the website along with the authors'  
responses. I agree for my report to be made available under a n Ope n Access Creative Commons  
CC-BY license ( http://creativecommons.org/licenses/by/4.0/ ). I understand that any comments  
which I do not wish to be included in my named report can be included as confidential comments  
to the editors, which will not be published . 
 
I agree to the open peer review policy of the journal