Genome-wide association studies have linked mutations in three human genes (Fussel15/hSKOR1, MEIS1 and BTBD9) to two ataxias in American, European and Chinese populations - Restless Leg Syndrome and Periodic Leg Movement Syndrome (Kemlink et al. 2009; Moore et al. 2014; Li et al. 2017). The gene discussed is BTBD9; the disease is restless legs syndrome.