DIAGNOSIS OF SUPERFICIAL NON-AMPULLARY DUODENAL EPITHELIAL TUMORS USING MAGNIFIED ENDOSCOPY WITH NARROW-BAND IMAGING - Kakushima, N; Yoshida, M; Takizawa, K; Tanaka, M; Kawata, N; Ito, S; Imai, K; Hotta, K; Ishiwatari, H; Matsubayashi, H; Yamaguchi, Y; Ono, H (Endoscopy, 2018)