1. Department of Pediatric Surgery, Pediatric Urology and Center for Severely Burned Children, Klinikum Kassel GmbH, Kassel, Hessen, Germany
2. Department of Pediatric Surgery, Navarre Hospital Complex, Pamplona, Navarre, Spain
3. Department of Surgery and Urology for Children and Adolescents, Medical University of Gdansk, Gdansk, Poland
4. Department of Anatomy and Molecular Neurobiology, Institute of Anatomy and Molecular Neurobiology, Westfälische-Wilhelms-University, Muenster, Westfalen, Germany
5. Department of Pediatric Surgery, University Hospital Leipzig, Leipzig, Germany