1 University of Texas Southwestern Medical Center, Department of Internal Medicine, Dallas, TX; Parkland Health, Dallas, TX.
2 University of Utah, Division of Cardiovascular Medicine, Salt Lake City. UT.
3 Parkland Health, Dallas, TX.
4 University of Texas Southwestern Medical Center, Department of Internal Medicine, Dallas, TX.
5 University of Texas Southwestern Medical Center, Department of Internal Medicine, Dallas, TX; Parkland Health, Dallas, TX. Electronic address: [email protected].