1 Department of Cardiovascular Medicine, Heart and Vascular Institute, Cleveland Clinic Foundation, Cleveland, Ohio.
2 Section of Cardiovascular Medicine, Department of Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina.
3 Viriginia Heart, Falls Church, Virginia; Inova Heart and Vascular Institute, Inova Fairfax Medical Campus, Falls Church, Virginia.
4 Inova Heart and Vascular Institute, Inova Fairfax Medical Campus, Falls Church, Virginia.
5 Section of Cardiovascular Medicine, Department of Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina. Electronic address: svallabh@wakehealth.edu.