GSTP1 and type 2 diabetes mellitus: The association between the Ile105Val GSTP1 polymorphism and the risk of T2DM has been investigated, but these studies yielded controversial results (Yalin et al., 2007[35]; Oniki et al., 2008[20]; Bid et al., 2010[6]; Tsai et al., 2011[33]; Ramprasath et al., 2011[21]; Amer et al., 2012[4]; Moasser et al., 2012[19]; Gönül et al., 2012[10]; Grubisa et al., 2013[11]; Mastana et al., 2013[17]; Vats et al., 2013[34]; Rao et al., 2014[22]; Abbasi et al., 2014[1]; Zaki et al., 2015[36]; Stoian et al., 2015[29]; Mergani et al., 2016[18]; Rasheed et al., 2016[23]; Ahmed and Al-Bachary, 2017[2]).