1 Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, 2-1-1 Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047, Japan. madoka_sano@kcho.jp.
2 Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, 2-1-1 Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047, Japan.
3 Department of Internal Medicine, Shimane University Faculty of Medicine, Izumo, Japan.
4 Department of Cardiovascular Surgery, Kobe City Medical Center General Hospital, Kobe, Japan.