1 Kidney Research Institute and Department of Medicine, Division of Nephrology, University of Washington, Seattle, Washington.
2 Hospital and Specialty Medicine Service and Health Services Research and Development Center of Innovation for Veteran-Centered and Value-Driven Care, VA Puget Sound Health Care System, Seattle, Washington.
3 Section of General Internal Medicine, Veterans Affairs Boston Health Care System, Boston, Massachusetts.
4 Department of Medicine, Division of General Internal Medicine, Brigham and Women's Hospital, Boston, Massachusetts.