The level of evidence for the gene KCNJ2 was only limited for the cardio-specific phenotype of LQTS, whereas both genes (CACNA1C and KCNJ2) were classified to have definitive evidence for causing multiorgan syndromes (respectively: Timothy syndrome and Andersen-Tawil syndrome). The gene discussed is KCNJ2; the disease is Andersen-Tawil syndrome.