1. Institute of Medical Physiology “Richard Burian”, Belgrade University Faculty of Medicine, 11000 Belgrade, Serbia
2. Institute of Clinical and Medical Biochemistry, Belgrade University Faculty of Medicine, 11000 Belgrade, Serbia
3. Institute of Histology and Embryology “Aleksandar Đ. Kostić”, Belgrade University Faculty of Medicine, 11000 Belgrade, Serbia
4. Clinic of Endocrinology, Diabetes and Metabolic Disease, UCCS, Belgrade University Faculty of Medicine, 11000 Belgrade, Serbia