1. 3rd Department and Clinic of Paediatrics, Immunology and Rheumatology of Developmental Age, Wroclaw Medical University, Wroclaw, Poland; Department of Immunology and Paediatrics, Provincial Hospital J. Gromkowski, Wroclaw, Poland
2. Department of Paediatrics, Provincial Hospital J. Gromkowski, Wroclaw
3. Department of Surgery, Wroclaw University of Environmental and Life Sciences, Wroclaw, Poland