1. Department of Hospital Pediatrics, Zaporizhzhya State Medical and Pharmaceutical University, 69035 Zaporizhzhya, Ukraine
2. First Department of Pediatrics and Neonatology, Kharkiv National Medical University, 61000 Kharkiv, Ukraine
3. Broegelmann Research Laboratory, Department of Clinical Science, University of Bergen, 5020 Bergen, Norway
4. Department of Microbiology, Virology and Immunology, I. Horbachevsky Ternopil State Medical University, 46001 Ternopil, Ukraine