1. Medical Toxicology Research Centre, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
2. Nourdanesh Institutes of Higher Education, Meymeh, Isfahan, Iran.
3. Departments of Microbiology, Faculty of Basic Sciences, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran.
4. Nosocomial Infection Research Center, Isfahan University of Medical Science, Isfahan, Iran.