Affiliation

• ¹ From the *Complutense University of Madrid, and †Department of Pediatrics, Infectious Disease Unit, Gregorio Marañón Hospital, Madrid, Spain; ‡Department of Pediatrics, Children's Clinic Hospital, Faculty of Medicine, Transilvania University, Brasov, Romania; §NIHR Wellcome Trust Clinical Research Facility, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom; ¶Vivantes Klinikum im Friedrichshain, and ‖Department of Pediatrics, Clinic for Pediatric and Adolescent Medicine, Berlin, Germany; **Department of Pediatrics, Franciscus Gasthuis & Vlietland, Rotterdam, The Netherlands; ††Baylor College of Medicine, and ‡‡Department of Pediatrics, Infectious Diseases Service, Texas Children's Hospital, Houston, Texas; §§Équipe opérationnelle d'infectiologie et service de pédiatrie générale, Hôpital Armand Trousseau, Université Pierre et Marie Curie, Paris, France; ¶¶Department of Pediatrics, Democritus University of Thrace Faculty of Medicine, University General Hospital of Evros, Alexandroupolis, Thrace, Greece; ‖‖Children's Hospital, University of Helsinki, Helsinki, Finland; ***Department of Pediatrics, Pediatric Infectious Diseases Unit, Hospital 12 de Octubre, Universidad Complutense, Madrid, Spain; †††The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; and ‡‡‡ALM Consulting, The Netherlands.