1. Department of Medicine, Lundquist Institute at Harbor-UCLA Medical Center, 1124 W Carson Street, Torrance, CA 90502, USA
2. Department of Medicine, Brigham and Women’s Hospital Heart & Vascular Center and Harvard Medical School, Boston, MA, USA
3. Intermountain Heart Institute, Intermountain Medical Center, Salt Lake City, UT, USA
4. Department of Medicine, Rocky Mountain University of Health Profession, Provo, UT, USA
5. California Cardiovascular Institute, Fresno, CA, USA