1. Clinic of Paediatric Respiratory Diseases and Tuberculosis, Jessenius Faculty of Medicine in Martin, National Institute of Paediatric Tuberculosis and Respiratory Diseases, Dolny Smokovec, Slovak Republic
2. Department of Pathological Physiology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovak Republic
3. Biomedical Center, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovak Republic