1 Department of Pediatric Surgery, Pediatric Gastroenterology and Hepatology, Department of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
2 Department of Pediatrics, European Research Institute for the Biology of Ageing (ERIBA), University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
3 Department of Pediatric Surgery, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
4 Albireo Pharma, Boston, Massachusetts.
5 Pediatric Gastroenterology and Hepatology, Department of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands. Electronic address: h.j.verkade@umcg.nl.