1 Division of Nephrology, Department of Medicine, University of Southern California, Los Angeles, CA; Leonard D Schaeffer Center for Health Policy and Economics, University of Southern California, Los Angeles, CA; University Kidney Research Organization, Kidney Research Center, Los Angeles, CA. Electronic address: eugeneli@usc.edu.
2 Leonard D Schaeffer Center for Health Policy and Economics, University of Southern California, Los Angeles, CA; Sol Price School of Public Policy, University of Southern California, Los Angeles, CA; Brookings Institution, Washington, DC.
3 Division of Nephrology, Department of Medicine, Stanford University School of Medicine, Stanford, CA; Department of Health Research and Policy, Stanford University School of Medicine, Stanford, CA.
4 Division of Nephrology, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA.