1 Cardiovascular Division, Brigham and Women's Hospital, Boston, Mass; Kidney and Hypertension Section, Joslin Diabetes Center, Boston, Mass; Departments of Medicine andSurgery,Beth Israel Deaconess Medical Center, Boston, Mass; Harvard Medical School, Boston, Mass.
2 Kidney and Hypertension Section, Joslin Diabetes Center, Boston, Mass; Departments of Medicine andSurgery,Beth Israel Deaconess Medical Center, Boston, Mass; Harvard Medical School, Boston, Mass.
3 Division of Nephrology, Departmentof Medicine, University of Maryland School of Medicine, Baltimore.
4 Division of Nephrology, Departmentof Medicine, University of Californiaat Los Angeles, Los Angeles.
5 Cardiovascular Division, Brigham and Women's Hospital, Boston, Mass.
6 Departments of Medicine andSurgery,Beth Israel Deaconess Medical Center, Boston, Mass; Harvard Medical School, Boston, Mass; Division of Nephrology, New EnglandMedical Center, Tufts UniversitySchool of Medicine, Boston,Mass.