1 Division of Nephrology and Hypertension, Kaiser Permanente Los Angeles Medical Center, Los Angeles, California; Department of Clinical Science, Kaiser Permanente Bernard J. Tyson School of Medicine. Electronic address: John.j.sim@kp.org.
2 Department of Research and Evaluation, Kaiser Permanente Southern California, Pasadena, California.
3 Department of Renal Pathology, Kaiser Permanente Los Angeles Medical Center, Los Angeles, California.
4 Department of Renal Medicine, Cork University Hospital, Cork, Ireland.