1. Departments of Urology, and
2. Division of Pediatric Urology, and
3. Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania;
4. Center for Fetal Diagnosis and Treatment, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania;
5. The Biostatistics Center, George Washington University, Washington, District of Columbia;
6. Department of Surgery, Benioff Children’s Hospital, and
7. Pediatric Surgery/Fetal Center, Vanderbilt University Medical Center, Nashville, Tennessee;
8. Lurie Children’s Hospital and Northwestern University, Chicago, Illinois;
9. Department of Urology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma;
10. Division of Urology, Warren Alpert Medical School of Brown University, Providence, Rhode Island;
11. Department of Diagnostic Imaging and Radiology, Children’s National Medical Center, Washington, District of Columbia; and
12. Pregnancy and Perinatology Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, Maryland
13. Department of Urology, University of California, San Francisco, San Francisco, California;