DNAH17 and Situs inversus totalis: Since the additional survey of 2,109 single exomes of individuals with situs inversus totalis, heterotaxy, or isolated CHD did not identify biallelic homozygous or compound heterozygous variants in DNAH17, biallelic variants in DNAH17 - if causative - might only be a rare cause of isolated situs inversus totalis with CHD.