Simple scoring system for the diagnosis of superficial non‐ampullary duodenal epithelial tumors. - Ishii, Rindo; Ohata, Ken; Sakai, Eiji; Takita, Maiko; Minato, Yohei; Muramoto, Takashi; Hashimoto, Hirotsugu; Morikawa, Teppei; Matsuhashi, Nobuyuki (Digestive Endoscopy, 2021)