Toxicol In Vitro. 2008 Mar;22(2):535-40. doi: 10.1016/j.tiv.2007.10.001. Epub 2007 Oct 9.
Response to the Huang et al. publication [Toxicol. Lett. 170 (2) 116-123]. In vitro test system of immortalized human uroepithelial cells (SV-40) was treated with para-phenylenediamine (PPD) solutions.