Table 3: Tumor-to-blood ratio in different tumor cells in in vitro study.

 1 hr4 hr24 hr48 hr

E746-A750 del/blood
Wild-type EGFR/blood

Data shown as average ± standard deviation ( for each tumor pair). All other three cell lines were compared to L858R tumor cells at the same time point, and statistically significant difference (* ) is indicated by an asterisk.