1. Clinical Center “Bežanijska kosa”, Belgrade, Serbia
2. Clinical Centre of Serbia, Clinic for Emergency Internal Medicine, Belgrade, Serbia + University of Belgrade, Faculty of Medicine, Belgrade, Serbia
3. University of Belgrade, Faculty of Medicine, Institute for Medical Statistics and Informatics, Belgrade, Serbia
4. Miltary Medical Academy, Clinic for Ophthalmology, Belgrade, Serbia + University of Defence, Faculty of Medicine of the Military Medical Academy, Belgrade, Serbia
5. Clinical Centre Zemun, Belgrade, Serbia
6. Clinical Centre of Serbia, Institute of Medical Biochemistry, Belgrade, Serbia
7. University Childrens Hospital, Belgrade, Serbia
8. University of Belgrade, Faculty of Medicine, Belgrade, Serbia + Clinical Centre of Serbia, Clinic for Endocrinology, Diabetes and Metabolic Diseases, Belgrade, Serbia
9. University of Belgrade, Faculty of Medicine, Belgrade, Serbia + Clinical Centre of Serbia, Clinic for Neurosurgery, Belgrade, Serbia
10. Clinical Center “Bežanijska kosa”, Belgrade, Serbia + University of Belgrade, Faculty of Medicine, Belgrade, Serbia