Gastric adenocarcinoma with a submucosal cyst treated by endoscopic submucosal dissection (ESD) - Ishii, N.; Matsuda, M.; Setoyama, T.; Suzuki, S.; Uchida, S.; Uemura, M.; Iizuka, Y.; Fukuda, K.; Horiki, N.; Fujita, Y. (Endoscopy, 2009)