1. Faculty of Medical Sciences, University of Kragujevac, 34000 Kragujevac, Serbia
2. Clinic of Psychiatry, University Clinical Center Kragujevac, 34000 Kragujevac, Serbia
3. Clinic of Pulmonology, University Clinical Center Kragujevac, 34000 Kragujevac, Serbia
4. Faculty of Medicine, Department of Psychiatry, University of Belgrade, 11000 Belgrade, Serbia
5. Clinic of Psychiatry, University Clinical Center of Serbia, 11000 Belgrade, Serbia