1 Department of Medicine, MedStar Health, Baltimore, Maryland.
2 Department of Medicine, University at Buffalo-Catholic Health System, Buffalo, New York.
3 Department of Medicine, Dow University of Health Sciences, Karachi, Pakistan.
4 Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, Texas.
5 Division of Cardiology, Duke University School of Medicine, Durham, North Carolina; Duke Clinical Research Institute, Durham, North Carolina.
6 Department of Cardiology, Saint Luke's Mid America Heart Institute, Kansas City, Missouri.
7 Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi; Baylor Scott and White Research Institute, Dallas, Texas.
8 Baylor Scott and White Research Institute, Dallas, Texas; The Heart Hospital Plano, Plano, Texas; Department of Medicine, Baylor College of Medicine, Temple, Texas. Electronic address: [email protected].