1. 2nd Department of Paediatrics, Centre of Postgraduate Medical Education, Warsaw, Poland; Department of Paediatrics and Allergology, National Medical Institute of the Ministry of the Interior and Administration, Warsaw, Poland
2. Chair and Department of Family Medicine, Wroclaw Medical University, Wrocław, Poland
3. Department of Paediatrics, Centre of Postgraduate Medical Education, Warsaw, Poland
4. Institute of Clinical Pharmacology, Department of Pharmacology, Jagiellonian University Medical College, Krakow, Poland; Clinical Department of Anesthesiology and Intensive Care, University Hospital in Krakow, Krakow, Poland
5. Department of Paediatrics with Observation and Isolation Unit, Medical University of Warsaw, Poland
6. Department of Pneumology, Institute of Tuberculosis and Lung Diseases, Rabka, Poland