1. Pediatric Urology Division, Arkansas Children’s Hospital, Little Rock, Arkansas, USA
2. University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
3. Arkansas Children’s Hospital Research Institute, Little Rock, Arkansas, USA
4. Department of Epidemiology and Biostatistics, Drexel University School of Public Health, Philadelphia, Pennsylvania, USA
5. Division of Urology, Department of Surgery, University of Mississippi Medical Center, USA