1. Faculty of Medicine, Institute of Epidemiology, University of Belgrade, 11000 Belgrade, Serbia
2. National Reference Laboratory for Toxoplasmosis, Group for Microbiology and Parasitology, Center of Excellence for Food- and Vector-Borne Zoonoses, Institute for Medical Research, National Institute of Republic of Serbia, University of Belgrade, 11129 Belgrade, Serbia
3. Blood Transfusion Institute of Serbia, 11000 Belgrade, Serbia