1. Student Research Committee, Department of Immunology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran;
2. Department of Immunology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran;
3. Infectious Diseases and Tropical Medicine Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran;
4. Infectious Disease Research Group, Student Research Committee, Medical School, Mashhad University of Medical Sciences, Mashhad, Iran