Affiliation: | 1. Department of Community Medicine, Shiraz Nephro-Urology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran;2. Student Research Center, Shiraz University of Medical Sciences, Shiraz, Iran;3. Resident of Community Medicine, Department of Community Medicine, Shiraz University of Medical Sciences, Shiraz, Iran;4. Infection Control Research and Services, Indiana University School of Dentistry, Indianapolis, IN |