1. Duke Clinical Research Institute, Department of Biostatistics and BioinformaticsDuke University School of Medicine Durham North Carolina
2. Division of Nephrology, Department of MedicineJohns Hopkins University School of Medicine Baltimore Maryland
3. Division of Kidney, Urologic and Hematologic DiseasesNational Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health Bethesda Maryland
4. Division of Preventive MedicineBrigham and Women's Hospital, Harvard Medical School Boston Massachusetts
5. Departments of Epidemiology, Medicine and BiostatisticsJohns Hopkins University Baltimore Maryland
6. Center for Clinical Epidemiology and BiostatisticsPerelman School of Medicine, University of Pennsylvania Philadelphia Pennsylvania
7. Department of Biostatistics, Epidemiology, and InformaticsPerelman School of Medicine, University of Pennsylvania Philadelphia Pennsylvania
8. Department of Mathematics and StatisticsMount Holyoke College South Hadley Massachusetts
9. Division of NephrologyUniversity of California, San Francisco San Francisco California
10. Division of Nephrology, Children's Hospital Los Angeles, Department of PediatricsKeck School of Medicine, University of Southern California Los Angeles California
11. Department of Biostatistics, School of Public HealthUniversity of Michigan Ann Arbor Michigan
12. Biostatistics Program National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health Bethesda Maryland
13. Department of Preventive Medicine and BiostatisticsF. Edward Hébert School of MedicineUniformed Services University of the Health Sciences Bethesda Maryland