Affiliation: | 1. Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Inohana, Chuo-ku, Chiba, Japan;2. Department of Cardiology, Matsudo City General Hospital, Sendabori, Matsudo, Chiba, Japan;3. Department of Cardiovascular Surgery, Matsudo City General Hospital, Sendabori, Matsudo, Chiba, Japan |