1. Section of Cardiology, Department of Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
2. Department of Medicine, University of California Riverside, Moreno Valley, CA 92555, USA
3. Department of Medicine, Weill Cornell Medical College, NY 10065, USA
4. Department of Medicine, University of Maryland, School of Medicine, Baltimore, MD 21201, USA
5. Stamford Health Medical Group, Stamford, CT 06905, USA
6. Department of Medicine, Memorial Sloan Kettering Cancer Center, NY 10065, USA