Affiliation: | 1. Department of Cardiovascular Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, , Hiroshima, Japan;2. Division of Cardiovascular Medicine, Higasihiroshima Medical Center, , Hiroshima, Japan;3. Division of Cardiovascular Medicine, Hiroshima City Asa Hospital, , Hiroshima, Japan;4. Division of Cardiovascular Medicine, Harvard‐Thorndike Electrophysiology Institute, Harvard Medical School, Beth Israel Deaconess Medical Center, , Boston, USA |