1 VU University Medical Center, Department of Urology, Division of Pediatric Urology, Amsterdam, Netherlands.
2 Indiana University Medical School, Pediatric Urology, Indianapolis, Indiana, USA.
3 Department of Pediatric Urology, Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden; Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden. Electronic address: Magdalena.Fossum@ki.se.
4 Department of Pediatric Urology, Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden; Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden.