The co-authors of the article are Dr. Ljubica Harhaji-Trajković, dr. Maja Misirkić Marjanović, and dr. Ljubica Vučićević from the Department of Neurophysiology, then Dr. Maja Jovanović from the Institute of Clinical and Medical Biochemistry, Faculty of Medicine, University of Belgrade, then Dr. Mihajlo Bošnjak, doc. dr. Vladimir Perović, dr. Biljana Ristić i prof. dr. Vladimir Trajković from Institute of Microbiology and Immunology, Faculty of Medicine, University of Belgrade and doc. dr. Darko Ćirić from Institute of Histology and Embryology "Aleksandar Đ. Kostić", Faculty of Medicine, University of Belgrade.