Several HLA genes (Hill-Burns et al., 2011) are thought to be associated with PD, besides HLA-DQB1 also HLA-DRA (Hamza et al., 2010; Pankratz et al., 2012; Hill-Burns et al., 2014) and HLA-DRB (Ahmed et al., 2012). The gene discussed is HLA-DQB1; the disease is Parkinson disease.