1 | University of Belgrade, Belgrade, Serbia (Faculty of Medicine) |
2 | Serbian Institute of Occupational Health “Dr Dragomir Karajović”, Belgrade, Serbia |
3 | Clinical Centre of Serbia, Belgrade, Serbia (Clinic for Physical Medicine and Rehabilitation) |
4 | Clinical Centre of Serbia, Belgrade, Serbia (Clinic for Pulmonology) |
5 | Institute of Medical Physiology, Belgrade, Serbia |
6 | Clinical Centre of Serbia, Belgrade, Serbia (Clinic for Otorhinolaryngology and Maxillofacial Surgery) |