IDENTIFYING AMPULLA AND DIFFICULTY OF SELECTIVE CANNULATION WITH ARTIFICIAL-INTELLIGENCE ASSISTED ANALYSIS OF ERCP IMAGE - Lee, KW; Lee, JM; Jeon, HJ; Kim, SH; Jang, S; Choi, SJ; Choi, HS; Kim, ES; Keum, B; Jeen, YT; Lee, HS; Chun, HJ; Kim, CD; Kim, J; Kim, T; Choo, J; Han, SY; Kim, DU; Kwon, S (Endoscopy, 2020)