Corrigendum to: Comparative evaluation of new and conventional classifications of magnifying endoscopy with narrow band imaging for invasion depth of superficial esophageal squamous cell carcinoma. Issue 6 (30th April 2020) - Fujiyoshi, T; Tajika, M; Tanaka, T; Ishihara, M; Mizuno, N; Hara, K; Hijioka, S; Imaoka, H; Yatabe, Y; Hirooka, Y; Goto, H; Yamao, K; et al.