Cell lines were incubated in 5% CO2 at 37 °C, and Trypan blue
staining was used to determine cell viability. Cells were grown to
~80% confluence for further experiments. All growth assays for cells
were performed in low nutrient media – 5% complete media. For
H69s this is 0.5% with FCS with 1/20th of the previously listed growth
factors for complete media. For the KKU-214 cell lines, this was RPMI
1640 medium with 0.5% with FCS.