?:authorAffiliation
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[\'Faculty of Medicine, University of Nis, 18000 Nis, Serbia.\', \'ENT Clinic, University Clinical Center of Nis, 18000 Nis, Serbia.\', \'Institute for Public Health Nis, 18000 Nis, Serbia.\', \'Clinic for Neurology, University Clinical Center of Nis, 18000 Nis, Serbia.\', \'Special Psyhiatric Hospital Gornja Toponica Nis, 18000 Nis, Serbia.\', \'Department of Otorhinolaringology, Clinical Center Kragijevac, 34 000 Kragujevac, Serbia.\', \'Faculty of Medical Science, University of Science Kragujevac, 34 000 Kragujevac, Serbia.\']
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