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5% to 10.4%; P less then 0.001) and at 18 cases for CR-IM (30.7% to 18.6%; P less then 0.001) from RA-CUSUM curve analysis. CONCLUSION Our data suggest that 18 supervised cases of endoscopic ablation may be required before competency in endoscopic treatment of Barrett's dysplasia can be achieved. The difference in outcomes between a high-volume and low-volume center does not support further centralization of services to only high-volume centers. BACKGROUND AND AIMS In recent years, the feasibility and safety of endoscopic placement of different biodegradabl
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