1. Department of Pediatric Pulmonology and Allergy, Medical University of Warsaw, 63A Zwirki i Wigury Street, 02-091 Warsaw, Poland
2. Department of Lung Diseases and Tuberculosis for Children and Adolescents, Mazovian Center for Treatment of Lung Diseases and Tuberculosis, Reymonta 83/91 Street, 05-400 Otwock, Poland