DCK and Carcinoma, Lewis Lung: In addition, the combination of DGBX decoction and gemcitabine enhances anti-cancer activity, represented by the increased level of granulocyte–macrophage colony-stimulating factor (GM-CSF), the enhanced immune ability, increased deoxycytidine kinase (dCK), and decreased P-glycoprote in a murine lewis lung carcinoma model [225].