We inferred neutral evolution for the three other microsatellites causative of the trinucleotide expansion disorders SCA3 (ATXN3) [112], dentatorubral-pallidoluysian atrophy (DRPLA) (ATN1) [113], and myotonic dystrophy type 1 (DM1) (DMPK) [114]. The gene discussed is ATN1; the disease is dentatorubral-pallidoluysian atrophy.