Strategy of small-caliber endoscopic submucosal dissection for esophageal neoplasia distal to severe stricture - Nishiyama, Noriko; Kobara, Hideki; Yachida, Tatsuo; Mori, Hirohito; Shi, Tingting; Okano, Keiich; Masaki, Tsutomu (Endoscopy, 2020)