1. Faculty of Medicine, Belgrade + Clinical Center of Serbia, Center for Anaesthesiology and ressuscitation, Belgrade
2. Faculty of Medicine, Belgrade + Clinical Center of Serbia, Center for Anaesthesiology and ressuscitation, Belgrade + Clinical Center of Serbia, Center for Endocrine surgery, Belgrade
3. Faculty of Dentistry, Belgrade
4. Clinical Center of Serbia, Center for Anaesthesiology and ressuscitation, Belgrade
5. Clinical-Hospital Center “Zemun”, Belgrade
6. General Hospital, Subotica
7. Faculty of Medicine, Belgrade + Clinical Center of Serbia, Center for Endocrine surgery, Belgrade