Using previously published primers5 polymerase chain reaction (PCR) results showed that in six individuals with the CED phenotype (missing coat and teeth including loss of molar cusps; see above), including the one with patchy hair coat, were heterozygous for the 7-bp duplication in the first exon on FOXI3, corroborating an earlier study5. Here, FOXI3 is linked to cranioectodermal dysplasia.