Seroprevalence of Toxocara Infection in Association with Different Risk Factors among Children of 4-12 Years Old Referred to Some Medical Centers in Aras Free Zone, Northwest Iran - YOUSEFI, Elham; ROKNI, Mohammad Bagher; HAZRATI TAPPEH, Khosrow; MOHEBALI, Mehdi; KHADEMVATAN, Shahram; ZAHABIUN, Farzaneh; KIA, Eshrat Beygom (Iranian Journal of Public Health, 2020)