**Application of Host Cell Reactivation in Evaluating the Effects of Anticancer Drugs and Environmental Toxicants on Cellular DNA Repair Activity in Head and Neck Cancer**

Yi-Shan Tsai1, Jau-Ling Huang2 and Chang-Shen Lin3

*1Center of Excellence for Environmental Medicine, Kaohsiung Medical University, Kaohsiung 2Department of Bioscience Technology, Chang Jung Christian University, Tainan 3Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung Taiwan* 
