1. Institute for Pulmonary Diseases of Vojvodina, Sremska Kamenica + College of Vocational Studies for the Education of Preschool Teachers and Sports Trainers, Department of Biomedical Sciences, Subotica + University of Novi Sad, Faculty of Medicine, Department of Internal Medicine, Novi Sad
2. College of Vocational Studies for the Education of Preschool Teachers and Sports Trainers, Department of Biomedical Sciences, Subotica
3. Institute for Pulmonary Diseases of Vojvodina, Sremska Kamenica + University of Novi Sad, Faculty of Medicine, Department of Internal Medicine, Novi Sad
4. Institute for Pulmonary Diseases of Vojvodina, Sremska Kamenica