Seroepidemiological Study of Human Hydatidosis in Meshkinshahr District, Ardabil Province, Iran - Heidari, Z; Mohebali, M; Zarei, Z; Aryayipour, M; Eshraghian, MR; Kia, EB; Shodajei, S; Abdi, J; Rakhshanpour, A; Rokni, MB (Iranian Journal of Parasitology)