1 Chronic Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran.
2 Chronic Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Otolaryngology Head and Neck Surgery, Masih Daneshvari Hospital, Neyavran, Daar Abad, Tehran, Iran. Electronic address: mahboob76181@yahoo.com.