1. Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Japan
2. Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Japan
3. Department of Radiology, Chiba University Hospital, Japan
4. Department of Cardiovascular Surgery, Saiseikai Yokohamashi Tobu Hospital, Japan
5. Department of Cardiovascular Medicine, Eastern Chiba Medical Center, Japan