論文（英文）
Progression-Free Survival As A Surrogate For Overall Survival In Advanced/Recurrent Gastric Cancer Trials: A Meta-Analysis
Paoletti X, Oba K, Bang Y, Bleiberg H, Boku N, Bouche O, Catalano P, Fuse N, Michiels S, Moehler M, Morita S, Ohashi Y, Ohtsu A, Roth A, Rougier P, Sakamoto J, Sargent DJ, Sasako M, Shitara K, Thuss-Patience P, Van Cutsem E, Burzykowski T, Buyse M. Progression-Free Survival As A Surrogate For Overall Survival In Advanced/Recurrent Gastric Cancer Trials: A Meta-Analysis. J Natl Cancer Inst 2013; 105: 1667-70.