1. Intensive Care and Department of Pediatric Surgery, Erasmus MC-Sophia Children's Hospital, University Medical Center Rotterdam, Rotterdam, The Netherlands
2. Department of Paediatric Infectious Diseases and Immunology, Great North Children's Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom
3. Division of Pediatric Hematology, Department of Pediatrics, Erasmus MC-Sophia Children's Hospital, University Medical Center Rotterdam, Rotterdam, The Netherlands
4. Department of Hematology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
5. Division of Pediatric Infectious Diseases and Immunology, Department of Pediatrics, Erasmus MC-Sophia Children's Hospital, University Medical Center Rotterdam, Rotterdam, The Netherlands
6. Department of Public Health, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands