1. Institute for Pulmonary Diseases of Vojvodina, Sremska Kamenica
2. 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
3. College of Social Work, Department of Psychology, Belgrade College of Applied Studies “Sirmium”, Department of Medical Sciences, Sremska Mitrovica
4. Institute for Pulmonary Diseases of Vojvodina, Sremska Kamenica + University of Novi Sad, Faculty of Medicine, Department of Internal Medicine, Novi Sad
5. Clinical Center of Vojvodina, Clinic of Otorhinolaryngology and Head and Neck Surgery, Novi Sad