0 -> Tumor_Cell_Population__T Tumor_Cell_Population__T -> 0 Tumor_Cell_Population__T -> 0 0 -> Effector_immune_cell_population__N 0 -> Effector_immune_cell_population__N Effector_immune_cell_population__N -> 0 Effector_immune_cell_population__N -> 0 Effector_immune_cell_population__N -> 0 0 -> Circulating_lymphocyte_population__C Circulating_lymphocyte_population__C -> 0 Circulating_lymphocyte_population__C -> 0 Chemotherapeutic_drug_concentration__M -> 0 0 -> Chemotherapeutic_drug_concentration__M Chemotherapeutic_drug_concentration__M -> 0