1. Institute of Virology and Antiviral Therapy, Jena University Clinic, Friedrich Schiller University of Jena, Jena, Germany
2. Institute of Medical Statistics, Computer Sciences and Documentation, Jena University Clinic, Jena, Germany
3. GlaxoSmithKline, Munich, Germany
4. Institute for Infection Medicine, Christian Albrecht University of Kiel, Kiel, Germany
5. Clinic of Paediatrics and Adolescent Medicine, Vivantes Clinic in Friedrichshain, Berlin, Germany
6. Children's Hospital, Bremen, Germany
7. University Children’s Hospital, Paediatric Infectious Diseases, Wuerzburg, Germany
8. HELIOS Children's Hospital, Krefeld, Germany
9. Department of Paediatrics and Adolescent Medicine, Clinic Dritter Orden, Munich, Germany
10. HELIOS Children's Hospital, Erfurt, Germany
11. University Children's Hospital Mannheim, Heidelberg University, Germany
12. HELIOS Children´s Hospital, Witten/Herdecke University, Wuppertal, Germany