1. Department of Oral Medicine, School of Dentistry Tehran University of Medical Sciences Tehran Iran
2. Department of Microbiology, School of Medicine Zanjan University of Medical Sciences Zanjan Iran
3. Department of Microbiology, School of Medicine Iranshahr University of Medical Sciences Iranshahr Iran
4. Department of Medical Laboratory Salale University College of Health Sciences Fiche Ethiopia
5. Department of Microbiology, School of Medicine Kermanshah University of Medical Sciences Kermanshah Iran