WDR19 and Sjogren-Larsson syndrome: No pathogenic variants were detected in the NPHP16,7, NPHP28, NPHP39, NPHP410, NPHP5/IQCB111, NPHP6/CEP29012,13, NPHP10/SDCCAG814, NPHP13/WRD1915,16, NPHP15/CEP16417 and TRAF3IP118 genes, variants of which are known to be cause SLS.