Fig. 2From: Vonoprazan versus lansoprazole in the treatment of artificial gastric ulcers after endoscopic submucossal dissection: a randomized, open-label trialA The ESD ulcer index is calculated by multiplying the length (a) by the width (b) of the resected specimen. B The 4- and 8-week ulcer indices were calculated by multiplying the length (c) by the width (d) of the artificial ulcer at 4 and 8 weeks, respectivelyBack to article page