Fig. 5From: Co-delivery of Dacarbazine and All-Trans Retinoic Acid (ATRA) Using Lipid Nanoformulations for Synergistic Antitumor Efficacy Against Malignant Melanomaa In vitro cytotoxicity assay of free DBZ and ATRA in a concentration-dependent manner. b In vitro cytotoxicity of free ATRA, DBZ, D-LNF, and RD-LNF at a fixed concentration of 25 μg/ml and 50 μg/mlBack to article page