aHarold Simmons Center for Kidney Disease Research and Epidemiology, Division of Nephrology, Hypertension and Kidney Transplantation, Department of Medicine, University of California Irvine School of Medicine, Orange, California, United States

bNephrology Section, Department of Medicine, Tibor Rubin Veterans Affairs Medical Center, Veterans Affairs Long Beach Healthcare System, Long Beach, California, United States

cMulti-Organ Transplant Center, Section of Nephrology, Department of Internal Medicine, William Beaumont Hospital, Oakland University William Beaumont School of Medicine, Royal Oak, Michigan, United States

dDivision of Nephrology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA

eLundquist Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, California, United States

Correspondence to Ramy M. Hanna, Division of Nephrology, Hypertension and Kidney Transplantation, Department of Medicine, University of California Irvine School of Medicine, 101 The City Drive South, Orange, California, 92868 United States. Tel: +1 714 456 5142; fax: +1 714 456 6034; e-mail: [email protected]