KCNH2 and asthma: In an EWAS analyzing differential DNA methylation associated with childhood asthma, several genes (loci) were confirmed as drug targets, including IL5RA (cg01310029, cg10159529), and KCNH2 (cg24576940, cg23147443, cg18666454).[73] These targets have been widely used in a variety of drugs.