Department of Urology, University of Washington School of Medicine, Seattle, WA, 98195, USA. jdharper@uw.edu. Division of Urologic Surgery, Department of Surgery, Washington University School of Medicine, St Louis, MO, USA. Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX, USA. Division of Pediatric Urology, Department of Surgery, The Children's Hospital of Philadelphia, Philadelphia, PA, USA. Division of Urology, Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA, USA. Department of Biostatistics and Bioinformatics, Duke Clinical Research Institute, Duke University School of Medicine, Durham, NC, USA. Department of Anesthesiology, Washington University School of Medicine, St Louis, MO, USA. Department of Internal Medicine, Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, TX, USA. Renal-Electrolyte and Hypertension Division, Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA. Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA. Department of Urology, University of Washington School of Medicine, Seattle, WA, 98195, USA. National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD, USA. Departments of Surgery and Population Health Science, Duke Surgical Center for Outcomes Research, Duke Clinical Research Institute, Duke University School of Medicine, Durham, NC, USA.