GSTP1 and type 2 diabetes mellitus: The rs1695 (Ile105Val) polymorphism is the most studied variant of the GSTP1 gene in a variety of human diseases such as type 2 diabetes [255], acute lymphoblastic leukemia [290], Hodgkin’s lymphoma [291], breast cancer [292], lung cancer [293], acute pancreatitis [294], Alzheimer’s disease [295], and bronchial asthma [296].