Development of an E-learning System for the Endoscopic Diagnosis of Early Gastric Cancer: An International Multicenter Randomized Controlled Trial oleh K. Yao, N. Uedo, M. Muto, H. Ishikawa, H.J. Cardona, E.C. Castro Filho, R. Pittayanon, C. Olano, F. Yao, A. Parra-Blanco, S.H. Ho, A.G. Avendano, A. Piscoya, E. Fedorov, A.P. Bialek, A. Mitrakov, L. Caro, C. Gonen, S. Dolwani, A. Farca, L.F. Cuaresma, J.J. Bonilla, W. Kasetsermwiriya, K. Ragunath, S.E. Kim, M. Marini, H. Li, D.G. Cimmino, M.M. Piskorz, F. Iacopini, J.B. So, K. Yamazaki, G.H. Kim, T.L. Ang, D.M. Milhomem-Cardoso, C.A. Waldbaum, W.A. Piedra Carvajal, C.M. Hayward, R. Singh, R. Banerjee, G.K. Anagnostopoulos, Y. Takahashi