KCND2 and cancer: The potassium voltage‐gated channel subfamily D (KCND, also known as Kv4) consists of three members, including KCND1 (Kv4.1), KCND2 (Kv4.2), and KCND3 (Kv4.3), which have been widely documented to be responsible for the initiation and advancement of cancers.10, 11, 12, 13