Inflammatory Lung Disease Research Center, Department of Internal Medicine, Razi Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran. Department of Health, Nutrition and Infectious Diseases, School of Medicine Guilan University of Medical Sciences, Rasht, Iran. Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran. Razi Clinical Research Development Center, Razi Hospital, Guilan University of Medical Sciences, Rasht, Iran. Department of Microbiology, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran.