Figure 4
![Figure 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13046-014-0110-9/MediaObjects/13046_2014_Article_110_Fig4_HTML.jpg)
Correlations between the cytotoxic activites (SI %) for the indicated pairs of standard cytotoxic drugs in gastric cancer samples at concentrations selected to provide optimal activity variation. These concentrations were: cisplatin, oxaliplatin and mitomycin-C 10 μM; 5-FU and irinotecan 100 μM; doxorubicin 1 μM; docetaxel 20 μM. Abbeviations: r, correlation coefficient; P, the level of statistical significance.