1 Department of Cardiology, Sendai Kousei Hospital, 4-15 Hirosemachi Aoba Sendai, Miyagi, 980-0873, Japan. h.suguru.1008@gmail.com.
2 Department of Cardiovascular Medicine, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi, 321-0293, Japan. h.suguru.1008@gmail.com.
3 Department of Cardiology, Sendai Kousei Hospital, 4-15 Hirosemachi Aoba Sendai, Miyagi, 980-0873, Japan.
4 Department of Cardiovascular Medicine, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi, 321-0293, Japan.