1. Research Center for Health Sciences, Hamadan University of Medical Sciences , Hamadan, Iran
2. Brucellosis Research Center, Hamadan University of Medical Sciences , Hamadan, Iran
3. Vice-Chancellor for Research and Technology, Kurdistan University of Medical Sciences , Sanandaj, Iran
4. Department of Microbiology, School of Medicine, Hamadan University of Medical Sciences , Hamadan, Iran
5. Center for Communicable Diseases Control, Ministry of Health & Medical Education , Tehran, Iran