1 John Ochsner Heart and Vascular Institute, Ochsner Clinical School, The University of Queensland School of Medicine, New Orleans, LA, USA. Electronic address: clavie@ochsner.org.
2 John Ochsner Heart and Vascular Institute, Ochsner Clinical School, The University of Queensland School of Medicine, New Orleans, LA, USA.
3 St. Luke's Mid America Heart Institute, Kansas City, MO, USA.