1. Department of Otorhinolaryngology, Erasmus University Medical Center-Sophia Children’s Hospital, Rotterdam, Netherlands
2. Division of Neonatology, Department of Pediatrics, Erasmus University Medical Center-Sophia Children’s Hospital, Rotterdam, Netherlands
3. Division of Neonatology, Department of Pediatrics, UMCU-Wilhelmina Children’s Hospital, Utrecht, Netherlands
4. Department of Biostatistics, Erasmus Medical University Center, Rotterdam, Netherlands