Genetic Variability of Antigen B2 of Human, Sheep, Goats, Camel and Cattle Isolates of Echinococcus granulosus in Iran - Sarkari Shahriari, Bahador; Biranvand, Elahe; Sadjjadi, Seyed Mahmoud; Rahimi, Hamidreza (Iranian Journal of Parasitology)