Review for 10.1186/s12876-016-0486-4 (2016)

Reviewer ’s report  
Title:  Limited precut  sphincterotomy combined with endoscopic  papillary balloon dilation for 
common bile duct stone removal in patients with difficult biliary cannulation  
 
Version : 2 Date : 18 Jun 2016  
 
Reviewer:  Jacob Freedman  
 
Reviewer's report:  
Thank you for your revisions. The word "annulation" should probably be "cannulation" (row 90).  
Of the 200 with a failed index ERCP, how many had an attempted limited PS &EPBD?, this 
figure is of major interest since it shows the success rate when the procedure is attempted in 
experienced hands.  
 
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.  
Unable to assess  
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 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  
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