1. Amsterdam UMC, University of Amsterdam, Vrije Universiteit, Emma Children’s Hospital, Department of Pediatrics, Amsterdam, The Netherlands
2. Neonatal Intensive Care Unit, Máxima Medical Center, Veldhoven, The Netherlands
3. Department of Epidemiology and Biostatistics, Amsterdam Public Health Research Institute, Amsterdam UMC, VU University Medical Center, Amsterdam, The Netherlands
4. Neonatal Intensive Care Unit, Beatrix Children’s Hospital, University Medical Center Groningen, Groningen, The Netherlands
5. Neonatal Intensive Care Unit, Amsterdam UMC, VU University Medical Center, Amsterdam, The Netherlands
6. Neonatal Intensive Care Unit, Amsterdam UMC, Academic Medical Center, Amsterdam, The Netherlands
7. Department of Pediatrics, Maastricht University Medical Center, Maastricht, The Netherlands
8. Neonatal Intensive Care Unit, Amalia Children’s Centre/Isala, Zwolle, The Netherlands
9. Neonatal Intensive Care Unit, Wilhelmina Children’s Hospital/University Medical Center Utrecht, Utrecht, The Netherlands
10. Department of Microbiology, Neonatal Intensive Care Unit, Amalia Children’s Hospital, Radboud Institute for Health Sciences, Nijmegen, The Netherlands
11. inBiome BV, Amsterdam, The Netherlands
12. Department of Gastroenterology and Hepatology, Amsterdam Gastroenterology and Metabolism Research Institute, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands