1 Saha Cardiovascular Research Center, University of Kentucky College of Medicine, Lexington, Kentucky; Department of Family Medicine, University of Kentucky College of Medicine, Lexington, Kentucky; Department of Surgery, University of Kentucky College of Medicine, Lexington, Kentucky.
2 Saha Cardiovascular Research Center, University of Kentucky College of Medicine, Lexington, Kentucky.
3 Saha Cardiovascular Research Center, University of Kentucky College of Medicine, Lexington, Kentucky; Department of Physiology, University of Kentucky College of Medicine, Lexington, Kentucky. Electronic address: Alan.Daugherty@uky.edu.