Clinical outcomes of endoscopic resection for undifferentiated intramucosal early gastric cancer larger than 2 cm

Hyo‐Joon Yang, Su Youn Nam, Byung‐Hoon Min, Ji Yong Ahn, Jae Young Jang, Jung Kim, Jie‐Hyun Kim, Wan‐Sik Lee, Bong Eun Lee, Moon Kyung Joo, Jae Myung Park, Woon Geon Shin, Hang Lak Lee, Tae‐Geun Gweon, Moo In Park, Jeongmin Choi, Chung Hyun Tae, Young‐Il Kim, Il Ju Choi