1. Heart Institute, InCor, University of Sao Paulo Medical School, São Paulo, Brazil
2. Division of Cardiology, Department of Medicine, Johns Hopkins Hospital and School of Medicine, 600 N. Wolfe St., Blalock 524, Baltimore, MD 21287, USA
3. National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
4. Charité Medical School, Humboldt, Berlin, Germany
5. Iwate Medical University, Morioka, Japan
6. St Luke's International Hospital, Tokyo, Japan
7. Mie University Hospital, Tsu, Japan
8. Beth Israel Deaconess Medical Center, Harvard University, Boston, MA, USA
9. Albert Einstein Hospital, São Paulo, Brazil
10. University of Copenhagen, Denmark
11. Keio University, Tokyo, Japan
12. Leiden University Medical Center, Leiden, the Netherlands
13. National Heart Center, Singapore, Singapore
14. Mount Elizabeth Hospital, Singapore, Singapore
15. Toronto General Hospital, Toronto, Canada
16. Brigham and Women's Hospital, Boston, MA, USA
17. Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA