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Summary of postoperative adverse event (AE) rates preintervention and postintervention for local and multicentre seminars. Surgical volume is indicated as a value at the base of each bar. Darker (top) subsections of bars represent major AE (PAL or AFIB in their respective graphs). Lighter (bottom) subsections represent minor AE. Error bars represent SE of the mean (SEM). AFIB, atrial fibrillation; PAl, prolonged air leak.
