Consistent with this discovery, thalidomide syndrome phenocopies Duane-radial ray syndrome (also called Okihiro syndrome; OMIM #607323), which is caused by mutations in SALL4 (Asakawa and Kawakami, 2018; Cox et al., 2002; Kohlhase et al., 2005). Here, SALL4 is linked to Okihiro syndrome.