RecruitingClinical trialEndoscopic Retrograde CholangiopancreatographyThe risk of post-endoscopic retrograde cholangiopancreatography(ERCP) pancreatitis(PEP) is influenced by patient and procedure-related factors. Strategies to decrease PEP(Post-Endoscopic Retrograde Cholangiopancreatography Pancreatitis) are of great importance.