General ERCP characteristics

A total of 61 endoscopists (46 expert, 15 less expert) at 22 academic centers in 11 countries (1–6 endoscopists per center) performed 551 procedures: 25 cases at 21 of the study sites and 26 cases in the other. The median number of procedures performed by each endoscopist was seven (range 1–25). All procedures were performed in endoscopy suites, almost all (99.6 %; 549/551) during normal working hours, and most with endoscopy processing staff present (79.1 %; 436 /551) (
