1. From the Cardiorenal Research Laboratory, Department of Cardiovascular Medicine (Y.C., G.J.H., Y.Z., S.R.I., S.S., S.J.S., T.I., J.C.B.), Mayo Clinic, Rochester, MN.
2. Mayo Clinic Graduate School of Biomedical Sciences (Y.C.), Mayo Clinic, Rochester, MN.
3. Department of Physiology and Biomedical Engineering (S.J.S., J.C.B.), Mayo Clinic, Rochester, MN.
4. Department of Laboratory Medicine and Pathology (J.P.G.), Mayo Clinic, Rochester, MN.
5. Department of Cardiovascular Medicine (H.-C.L., X.L.W.), Mayo Clinic, Rochester, MN.