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Cumulative sum (Cusum) analysis for successful endoscopic ultrasound-guided tissue acquisition for trainees (A) and experienced investigators (B).
T, trainee; E, expert. Over the study period trainee 1 (T1*) and trainee 2 (T2†) reached the suggested number of procedures to achieve competency. In panel B, they are presented as expert 1 (E1*) and expert 4 (E4†).
