KCNQ2 and Epileptic encephalopathy: A literature search of PubMed was undertaken using the key words KCNQ2 encephalopathy, KCNQ2 developmental encephalopathy, KCNQ2 seizures, KCNQ2 developmental and epileptic encephalopathy, KCNQ2 epileptic encephalopathy, KCNQ2‐EEG and KCNQ2‐DEE.