Nonetheless, reports of significant association with PD also exist, such as for the GSTM1 variant in Chileans (Perez-Pastene et al., 2007), the GSTT1 variant in a UK population (De Palma et al., 1998), and the rs4925 in Americans (Wahner et al., 2007). The gene discussed is GSTM1; the disease is Parkinson disease.