(3) S-VEGF levels were determined using a quantitative sandwich enzyme immunoassay technique.
As with the previous study discussed, S-VEGF levels corresponded with the stage of the cancer.
In an interesting study, Zhao, et al, evaluated S-VEGF (by ELISA) and endostatin levels (by competitive enzyme immunoassay) in 59 breast-cancer patients before surgery and three weeks following surgery.