1. Student Research Committee, Iran University of Medical Sciences, Tehran, Iran.
2. Department of Microbiology, Iran University of Medical Sciences, Tehran, Iran.
3. Department of Microbiology, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran.
4. Department of Food Microbiology, Islamic Azad University, Damghan, Iran.
5. Department of Microbiology, North Tehran Branch, Islamic Azad University, Tehran, Iran.
6. Department of Molecular Biology, Pasteur Institute of Iran, Tehran, Iran.