1. Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Heidelberg, Germany
2. Department for Health Evidence, Radboud University Medical Center, Nijmegen, The Netherlands
3. Associazione Italiana per le Malormazioni Anorettali—AIMAR, Rome, Italy
4. Self-Help Organisation for People with Anorectal Malformation—SoMA e.V., Munich, Germany
5. Department of Neonatology, Children's Hospital, University of Bonn, Bonn, Germany
6. Department of Pediatric Surgery and Urology, Centre for Child and Youth Health, Klinikum Bremen-Mitte, Bremen, Germany
7. Department of Pediatric Surgery, Ospedale Ca' Foncello, Treviso, Italy
8. Department of Pediatric Surgery, Radboudumc-Amalia Children's Hospital, Nijmegen, The Netherlands