Can optical evaluation distinguish between t1a and t1b esophageal adenocarcinoma: an international expert inter-observer agreement study.

Gupta S, Mandarino FV, Shahidi N, Hourigan LF, Messmann H, Wallace MB, Repici A, Dinis-Ribeiro M, Haber GB, Taylor ACF, Waxman I, Siersema PD, Pouw RE, Lemmers A, Bisschops R, Mosko JD, Teshima C, Ragunath K, Rösch T, Pech O, Beyna T, Sharma P, Lee EY, Burgess NG, Bourke MJ