Text and Data Mining valid from 2018-11-06
Received: 4 May 2018
Accepted: 24 October 2018
First Online: 6 November 2018
Ethics approval and consent to participate
: All patients provided informed written consent prior to undergoing ERCP. The study was conducted in agreement with the Declaration of Helsinki and received approval from the ethics committee of Shiga University of Medical Sciences and conformed to its guidelines.
: Not applicable
: The authors declare that they have no competing interests.
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