1. Department of Pediatric Surgery, Hannover Medical School , Hannover , Germany
2. European Reference Network for Rare Inherited and Congenital Anomalies (ERNICA)
3. Institute of Biostatistics, Hannover Medical School , Hannover , Germany
4. Department of Pediatric Surgery, New Children´s Hospital, Helsinki University Hospital and University of Helsinki , Helsinki , Finland
5. Stem Cells and Regenerative Medicine Section, UCL Great Ormond Street Institute of Child Health , London , UK
6. Department of Surgery and Transplantation, University Hospital Zurich , Zurich , Switzerland