1. From the Division of Nephrology and Hypertension (Z.-L.L., J.R.W., B.E., J.A.C., K.L.J., L.O.L.), Mayo Clinic, Rochester, MN; Division of Vascular Surgery (Z.-L.L., S.-M.W.), the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China; Division of Cardiovascular Diseases (A.L., L.O.L.), Mayo Clinic, Rochester, MN.