1. Division of Cardiology, University of Louisville, 201 Abraham Flexner Way, Louisville, KY 40202, USA
2. Division of Cardiovascular Medicine, Krannert Cardiovascular Research Center, Indiana University, Indianapolis, IN 46202, USA
3. Department of Medicine Providence, Veterans Affairs Medical Center, Providence VAMC, 830 Chalkstone Ave, Providence, RI 02908, USA
4. Department of Medicine, Providence VAMC, Alpert Medical School, Brown University, Providence, RI 02908, USA
5. Sparrow Health System, Lansing, MI 48912, USA
6. Division of Cardiology, Department of Medicine, National Jewish Health, Denver, CO 80206, USA