1. Krannert Institute of Cardiology and Division of Cardiology; Department of Medicine; Indianapolis Indiana USA
2. Division of Cardiology, Department of Internal Medicine; Catholic University of Daegu School of Medicine; Daegu Korea
3. Department of Biostatistics; Indiana University School of Medicine; Indianapolis Indiana USA
4. Cardiovascular Research Laboratory, Departments of Medicine (Cardiology) and Physiology, David Geffen School of Medicine; University of California; Los Angeles California USA