Affiliation: | (1) Department of Paediatrics, University of Leuven, B-3000 Leuven, Belgium;(2) Department of Virology, University of Leuven, B-3000 Leuven, Belgium;(3) Department of Pathology, University of Leuven, B-3000 Leuven, Belgium;(4) Department of Clinical Chemistry, University of Leuven, B-3000 Leuven, Belgium;(5) Department of Paediatrics, University Hospital Gasthuisberg, Herestraat 49, 3000 Leuven, Belgium |