0 -> T_Tumor_Cells T_Tumor_Cells -> 0 T_Tumor_Cells -> 0 0 -> L_CD8_T_Cells L_CD8_T_Cells -> 0 L_CD8_T_Cells -> 0 0 -> D_Dendritic_Cells D_Dendritic_Cells -> 0 0 -> D_Dendritic_Cells 0 -> H_CD4_T_Cells H_CD4_T_Cells -> 0