2 Division of Infectious Diseases and Hospital Epidemiology, University Children's Hospital Zurich, Steinwiesstrasse 75, 8032, Zurich, Switzerland.
3 Infectious Diseases and Hospital Epidemiology, Children's Hospital of Eastern Switzerland, Claudiusstrasse 6, 9006, St. Gallen, Switzerland.
4 Paediatric Infectious Diseases, University of Basel Children's Hospital, Spitalstrasse 33, 4056, Basel, Switzerland.
5 Department of Pediatric Infectious Diseases, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 15, 3010, Bern, Switzerland.
6 Pediatric Infectious Diseases and Vaccinology Unit, Department Mother-Woman-Child, Lausanne University Hospital, Lausanne, Switzerland.
7 Pediatric Infectious Diseases, Pediatric Institute of Southern Switzerland, Ospedale Regionale di Bellinzona e Valli, Via Ospedale 12, 6500, Bellinzona, Switzerland.
8 General Pediatrics & Pediatric Infectious Diseases Unit, Department of Woman, Child and Adolescent, University Hospitals of Geneva & Medical School of Geneva, 6, rue Willy-Donzé, 1211, Geneva 14, Switzerland.
9 Department of Paediatrics, Fribourg Hospital HFR and Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland.
10 Paediatric Infectious Diseases, Department of Paediatrics, Cantonal Hospital Winterthur, Brauerstrasse 15, 8401, Winterthur, Switzerland.