1. Department of Children’s Infectious Diseases, Medical University of Warsaw; Regional Hospital of Infectious Diseases in Warsaw
2. Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz
3. Department of Infectious Diseases and Child Neurology, Poznan University of Medical Sciences
4. Department of Children’s Infectious Diseases, Provincial Jan Boży Hospital in Lublin
5. Department of Pediatrics and Infectious Diseases, Wroclaw Medical University
6. Department of Pediatric Infectious Diseases, Medical University of Lodz
7. Department of Pediatrics and Infectious Diseases, Regional Hospital in Szczecin
8. Collegium Medicum Jan Kochanowski University, Kielce
9. 2nd Department of Pediatrics, Centre of Postgraduate Medical Education, Warsaw
10. Department of Pediatrics and Neonatology with Allergology Center, Central Clinical Hospital of the Ministry of the Interior, Warsaw
11. Department of Pediatrics with Clinical Assessment Unit, Medical University of Warsaw
12. Department of Pediatrics, Pediatric Nephrology and Allergology, Military Institute of Medicine, Warsaw
13. Department of Pediatric Infectious Diseases, Medical University of Bialystok
14. Department of Pediatric Infectious Diseases, Pomeranian Center of Infectious Diseases and Tuberculosis in Gdańsk
15. The Ward of Pediatric Infectious Diseases and Hepatology, The John Paul II Hospital in Krakow