1. Department of Paediatric Pulmonology, University Children’s Hospital, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia
2. Institute of Microbiology and Immunology, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia
3. Department of Infectious Diseases, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia
4. Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia