EPHX1 and lung cancer: Consecutively, a number of case–control studies have examined the influence of the mEH polymorphisms on lung cancer risk (Persson et al, 1999; Lin et al, 2000; London et al, 2000; To-Figueras et al, 2001; Wu et al, 2001; Zhao et al, 2002; Zhou et al, 2001,2002), resulting in somewhat inconsistent findings.