1. From the Division of Nephrology and Hypertension, Department of Medicine, Oregon Health and Science University, Portland (A.S.T., C.-L.Y., J.A.M., N.P.M., S.L.R., D.H.E.); Renal Section, VA Medical Center, Portland, OR (C.-L.Y., N.P.M., D.H.E.); Institute of Anatomy, University of Zurich, Zurich, Switzerland (S.G., K.T., J.L.); and Department of Anesthesiology, Vanderbilt University Medical School, Nashville, TN (E.D.).