1. Center of Medical Ultrasonics; Saitama Medical Center; Dokkyo Medical University; Saitama Japan
2. Department of Cardiology; Saitama Medical Center; Dokkyo Medical University; Saitama Japan
3. Department of Cardiovascular Medicine; Applied Life Sciences; Institute of Biomedical & Health Sciences; Hiroshima University; Hiroshima Japan
4. Smidt Heart Institute, Cedars-Sinai Medical Center; Los Angeles CA USA
5. David Geffen School of Medicine; University of California; Los Angeles CA USA