1. Department of Pathobiology, School of Public Health and Biotechnology Research Center, Tehran University of Medical Sciences, Tehran, Iran.
2. Department of Internal Medicine, Shahid Mostafa Khomeini Hospital, Shahed University, Tehran, Iran.
3. Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
4. Department of Microbiology and Virology, Zanjan University of Medical Sciences, Zanjan, Iran.
5. Division of Microbiology, Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.