1. PhD student of Bacteriology, Department of Bacteriology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
2. Professor, Department of Bacteriology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
3. Professor, Department of Epidemiology and Biostatics, Research Centre for Emerging and Reemerging Infectious Diseases, Pasteur Institute of Iran, Tehran, Iran