1. Department of Parasitology, School of Medicine, Mazandaran University of Medical Sciences , Sari , 48168-95475, Iran
2. Gastrointestitional Cancer Research Center, Non-communicable Disease Institute, Mazandaran University of Medical Sciences , Sari , 48168-95475, Iran
3. Department of Parasitology and Entomology, Faculty of Medical Sciences, Tarbiat Modares University , Tehran , 14115-331, Iran
4. Toxoplasmosis Research Center, Communicable Diseases Institute, Mazandaran University of Medical Sciences , Sari , 48168-95475, Iran