Jovan Lovrenski1, Gordana Vilotijević Dautović2, Aleksandra Lovrenski3. 1. Radiology Department, Faculty of Medicine, University of Novi Sad, Institute for Children and Adolescents Health Care of Vojvodina, Novi Sad, Serbia. 2. Pulmonology Department, Faculty of Medicine, University of Novi Sad, Institute for Children and Adolescents Health Care of Vojvodina, Novi Sad, Serbia. 3. Pathology Department, Faculty of Medicine, University of Novi Sad, Institute for Pulmonary Diseases, Sremska Kamenica, Serbia.