SLC6A20 and cranioectodermal dysplasia: Interestingly, a locus predisposing to CeD (CELIAC9) has been mapped to 3p21, but the COVID-19 risk allele GA of the polymorphism rs11385942 is associated with reduced expression of CXCR6 and increased expression of SLC6A20, such genes being different from those directly involved in CeD.