A new classification for the diagnosis of superficial non-ampullary duodenal epithelial tumors using endocytoscopy: A prospective study. - Muramoto T; Ohata K; Sakai E; Inamoto R; Kurebayashi M; Takayanagi S; Kimoto Y; Suzuki Y; Ishii R; Ono K; Negishi R; Takita M; et al. (Journal of gastroenterology and hepatology, 2021)