Task: Answer Verification
Input (English): Question: Is cannulation time a more accurate measure of cannulation difficulty in endoscopic retrograde cholangiopancreatography than the number of attempts?
Answer: The grade of cannulation difficulty for a given ERCP procedure may differ when different methods are used (total cannulation time vs number of attempts); thus, grading by different methods should not be used interchangeably. Cannulation time is a more objective and more accurate assessment tool for grading cannulation difficulty than the number of attempts to cannulate the papilla.
Output (English): yes