1. Department of Pediatrics and Clinical Genetics; Academic Medical Center, University of Amsterdam; Amsterdam; The Netherlands
2. Department of Genetics, Children's Hospital of Eastern Ontario, Department of Pediatrics; University of Ottawa; Ottawa; Canada
3. National Human Genome Research Institute, National Institutes of Health; Bethesda, Maryland
4. Division of Medical Genetics, Human Genetics, Pathology, Obstetrics and Gynecology; University of Utah; Salt Lake City, Utah
5. Departments of Human Genetics, Pediatrics and Urology; David Geffen School of Medicine, UCLA; Los Angeles, California