1. Department of Medicine; Duke Clinical Research Institute; Durham North Carolina
2. Department of Medicine; Seoul National University Hospital; Seoul South Korea
3. Department of Biostatistics; Duke Clinical Research Institute; Durham North Carolina
4. Department of Cardiovascular Medicine; Chonnam National University Hospital; Gwangju South Korea
5. Department of Internal Medicine; Seoul National University Hospital; Seoul South Korea
6. Department of Internal Medicine; University of Michigan Hospitals; Ann Arbor Michigan
7. Department of Medicine, Cedars Sinai Heart Institute; Advanced Health Sciences Pavilion; Los Angeles California