Relative mRNA expression of ABCC1 and ABCC2 drug transporters of cisplatin treatment of 3D co-culture aggregates of adenocarcinoma cell line A549-NHLF (A) and (B); 3D co-culture aggregates of squamous cell line H520-NHLF (C) and (D). The gene discussed is ABCC2; the disease is adenocarcinoma.