Response of the authors regarding article "J point elevation in high precordial leads associated with risk of ventricular fibrillation". - Hasegawa Y; Watanabe H; Ikami Y; Otsuki S; Iijima K; Yagihara N; Izumi D; Minamino T (Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc, 2021)