1. Department of Immunology, Collegium Medicum Nicolaus Copernicus University, Bydgoszcz 85-094, Poland
2. Department of Pediatric Endoscopy and Gastrointestinal Function Testing, Collegium Medicum Nicolaus Copernicus University, Bydgoszcz 85-094, Poland
3. Department of Clinical Pathomorphology, Collegium Medicum Nicolaus Copernicus University, Bydgoszcz 85-094, Poland
4. Department of Otolaryngology and Laryngological Oncology, Poznan University of Medical Science, Poznan 61-866, Poland
5. Chair of Oncologic Pathology and Prophylaxis, Poznan University of Medical Sciences & Greater Poland Cancer Center, Poznan 61-866, Poland
6. Department of Microbiology and Immunology, The Children’s Memorial Health Institute, Warsaw 04-730, Poland