1. Department of Microbiology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran.
2. Department of Epidemiology, Pasteur Institute of Iran, Tehran, Iran.
3. West Tuberculosis Center, Kermanshah University of Medical Sciences, Kermanshah, Iran.
4. Department of Microbiology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
5. Department of Environmental Health, Public Health College, Kermanshah University of Medical Sciences, Kermanshah, Iran.
6. Department of Biostatistics, Faculty of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran.