Letter: a potassium‐competitive acid blocker vs a proton pump inhibitor for healing endoscopic submucosal dissection‐induced artificial ulcers after treatment of gastric neoplasms. Issue 5 (September 2017) - Ban, H.; Sugimoto, M.; Otsuka, T.; Murata, M.; Nakata, T.; Hasegawa, H.; Fukuda, M.; Inatomi, O.; Bamba, S.; Kushima, R.; Andoh, A.