VEGF Trap complex formation measures production rates of VEGF, providing a biomarker for predicting efficacious angiogenic blockade. - Rudge JS; Holash J; Hylton D; Russell M; Jiang S; Leidich R; Papadopoulos N; Pyles EA; Torri A; Wiegand SJ; Thurston G; Stahl N; et al. (Proceedings of the National Academy of Sciences of the United States of America, 2007)