1. Department of Parasitology, Faculty of Medical SciencesTarbiat Modares University Tehran Iran
2. Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver DiseasesShahid Beheshti University of Medical Sciences Tehran Iran
3. Infectious Diseases and Tropical Medicine Research Center, Health Research InstituteBabol University of Medical Sciences Babol Iran
4. Abadan Faculty of Medical Sciences Abadan Iran
5. Rangaraya Medical CollegeNTR University of Health Sciences Kakinada India