ERCC4 and breast cancer: For the XPF-rs1800067 SNP, the final analysis included nine breast cancer studies [13], [21], [23], [27], [29], [31], [32], four colorectal cancer studies [14], [22], [24], [28], three cancer studies of head and neck [18], [25], [41], two lung cancer studies [15], [20], and five studies of other cancers [12], [19], [26], [30].