XRCC1 and cervical cancer: Only one study has analyzed XRCC1 SNPs at codon 399, and another study has analyzed SNPs at codon 194 recently, the results have shown that the XRCC1 Arg399Trp polymorphism or the XRCC1 Arg194Trp polymorphism is associated with the response to platinum-based NAC in cervical cancer, but the number of cases were all small (36 patients and 66 patients respectively) [10,11].