Received: 5 December 2019
Accepted: 17 May 2020
First Online: 1 June 2020
Ethics approval and consent to participate
: Institutional Review Board at Yonsei University Gangnam Severance Hospital, Seoul, Korea permitted research usage of the clinical electrocardiograms under Grant 3–2017-0379. Institutional Review Board at Yonsei University Gangnam Severance Hospital approves a research project that has omitted any personal identification information, and re-identified the personal identification information as a research subject number to allow a waiver of the consent for research participation including publication.
: Not applicable.
: The authors declare that they have no competing interests.