1. Paediatric Infectious Diseases, Department of Paediatrics, University Children's Hospital Mannheim Heidelberg University Mannheim Germany
2. Centre for Infectious Diseases, Institute of Medical Microbiology and Hygiene Saarland University Homburg Germany
3. Department of Surgical and Biomedical Sciences, Santa Maria della Misericordia Hospital Università degli Studi di Perugia Perugia Italy
4. Institute of Virology University Hospital Düsseldorf Düsseldorf Germany
5. Department of Paediatric Oncology and Haematology Saarland University Hospital Homburg Germany
6. Department of Paediatrics University of Würzburg Würzburg Germany
7. Department of Paediatrics, Children's Hospital Helios Dr. Horst Schmidt Klinik Wiesbaden Germany
8. Department of Paediatrics University Medicine Mainz Germany
9. Hillel Yaffe Medical Center Hadera Israel
10. Technion‐Israel Institute of Technology Ruth and Bruce Rappaport Faculty of Medicine Haifa Israel
11. Department of Paediatrics Bnai‐Zion Medical Center Haifa Israel
12. Institute for Clinical Chemistry University of Heidelberg Mannheim Germany
13. Department of Medicine and Surgery, Pediatric Clinic, Pietro Barilla Children's Hospital University of Parma Parma Italy
14. Clinic for Child and Adolescent Medicine, Sana Klinikum Lichtenberg, Academic Teaching Hospital Charité‐Universitätsmedizin Berlin Germany