1. From the Department of Surgery, Division of Cardiothoracic Surgery, Emory University School of Medicine, Atlanta, GA (S.B., K.K., B.L.P., M.Z., A.L.K., C.P., M.E.C., D.J.L.); Carlyle Fraser Heart Center, Emory University Hospital Midtown, Atlanta, GA (S.B., K.K., B.L.P., M.Z., A.L.K., C.P., M.E.C., D.J.L.); and Department of Anatomy, Physiology, and Pharmacology, Auburn University College of Veterinary Medicine, Auburn, AL (H.H., Y.-X.T.).