While our manuscript was in revision, another study was published showing that loss-of-function mutations in SOX10 cause Kallmann's syndrome with deafness and describing the same OEC phenotype in Sox10 mutant mice, thus implicating neural crest-derived OECs in the aetiology of Kallmann's syndrome (Pingault et al., 2013). This evidence concerns the gene SOX10 and Kallmann syndrome.