Institute of Digestive Endoscopy and Medical Centre for Digestive Disease Second Affiliated Hospital of Nanjing Medical University Nanjing 210011 Jiangsu Province China;
Institute of Digestive Endoscopy and Medical Centre for Digestive Disease Second Affiliated Hospital of Nanjing Medical University Nanjing 210011 Jiangsu Province China;
Institute of Digestive Endoscopy and Medical Centre for Digestive Disease Second Affiliated Hospital of Nanjing Medical University Nanjing 210011 Jiangsu Province China;
Institute of Digestive Endoscopy and Medical Centre for Digestive Disease Second Affiliated Hospital of Nanjing Medical University Nanjing 210011 Jiangsu Province China;
Institute of Digestive Endoscopy and Medical Centre for Digestive Disease Second Affiliated Hospital of Nanjing Medical University Nanjing 210011 Jiangsu Province China;
Institute of Digestive Endoscopy and Medical Centre for Digestive Disease Second Affiliated Hospital of Nanjing Medical University Nanjing 210011 Jiangsu Province China;
Institute of Digestive Endoscopy and Medical Centre for Digestive Disease Second Affiliated Hospital of Nanjing Medical University Nanjing 210011 Jiangsu Province China;
Endoscopic retrograde cholangiopancreatography; Difficult cannulation; Cannulation techniques; Elderly; Adverse events; Post-endoscopic retrograde cholangiopancreatography pancreatitis;