Non-cardia early gastric cancer in Central Vietnam: noticeable uncommon background mucosa and results of endoscopic submucosal dissection - Tran, Van Huy; Tran, Quang Trung; Nguyen, Thi Huyen Thuong; Dang, Cong Thuan; Lerch, Markus M.; Aghdassi, Ali A.; Miayahara, Ryoji (Endoscopy International Open, 2022)