aCenter of Translational Immunology, UMC Utrecht

bDepartment of Pediatric Infectious Diseases and Immunology, Wilhelmina Children's Hospital, Utrecht

cCentre for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, The Netherlands

dCenter for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, United Kingdom

eDepartment of Pediatric Infectious Diseases and Immunology

fSection Pediatric Infectious Diseases, Laboratory of Medical Immunology, Radboud Center for Infectious Diseases, Radboudumc, Nijmegen, The Netherlands

Correspondence to Lilly M. Verhagen, MD, MHSc, Epidemiologist, PhD, Radboudumc, Nijmegen, Netherlands. Tel: +31 624 3614430; e-mail: [email protected]