1. Department of Pediatric Hematology, Emma Children’s Hospital, and
2. Department of Vascular Medicine–Amsterdam Cardiovascular Sciences, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands;
3. Department of Pediatrics, Tongji Hospital, Tongji Medical University, Wuhan, China;
4. Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China;
5. Department of Pediatrics, Inha University Hospital, Incheon, Korea; and
6. Department of Clinical Epidemiology, Leiden University Medical Center, Leiden University, Leiden, The Netherlands