1. Department of Medicine (Cardiovascular Division), Beth Israel Deaconess Medical Center, Boston, MA
2. Department of Cardiology, Kanagawa Cardiovascular and Respiratory Center, Yokohama, Kanagawa, Japan
3. Department of Radiology, Kanagawa Cardiovascular and Respiratory Center, Yokohama, Kanagawa, Japan
4. Department of Cardiology, Yokohama City Medical Center, Yokohama, Kanagawa, Japan
5. Department of Medical Science and Cardiorenal Medicine, Yokohama City University Hospital, Yokohama, Kanagawa, Japan